PENICILLAMINAMIDE DERIVATIVES

Abstract: Compounds represented by the general formula (I) wherein n represents 1 or 2; R 1 represents, for example, a C 1 -C 10 alkyl group which may be substituted with a C 3 -C 10 cycloalkyl group or carboxyl group; R 2 represents hydrogen atom, a C 1 -C 10 alkyl group or other; and R 3 represents amino group or amidino group, whose example include trans-4-amino-[(S)-N-[(S)-2-propoxycarbonylamino-3-isopropylthio-3-methyl-butanoyl]prolyl]aminomethylcyclohexane The compounds have potent inhibitory activity against thrombin, and are useful as anticoagulants.

Description: Technical Field The present invention relates to novel penicillaminamide derivatives. More specifically, the present invention relates to penicillaminamide derivatives and salts thereof which have inhibitory activity against proteases, in particular, antithrombotic activity. The present invention also relates to protease inhibitors comprising said substances as active ingredients. Background Art It is well known that various kinds of proteases exist in living bodies. For example, the existence of a class of serine proteases such as thrombin, factor Xa, factor IXa, factor VIIa, trypsin, plasmin, tissue plasminogen activator, kallikrein, C1 enzyme in complement, C3/C5 convertase, and tryptase are known. It is also known that various kinds of diseases are caused when these proteases are abnormally activated by some reasons. Accordingly, substances having inhibitory activity against these proteases are expected to be useful as medicaments. For example, it is known that antithrombotic agents are effective as therapeutic medicaments for thrombosis, and for this reason, developments of protease inhibitors having antithrombotic activity have been progressing. However, these inhibitors have several problems of, for example, insufficient stability in vivo or non-selectivity to serine proteases other than thrombin, or decrease of antithrombotic activity when administered orally. Therefore, the inhibitors are not satisfactory for practical applications. Some tripeptide derivatives containing a moiety of arginine derivative are also known as protease inhibitors. For example, D-phenylalanyl-L-prolyl-L-arginal is known as a thrombin inhibitor (for example, Folia Haematol. 109 , 22 (1982)). However, this compound is relatively unstable in a living body (J. Med. Chem., 33, 1729 (1990)). There are also several reports about arginal derivatives (the Japanese Patent Unexamined Publication No. (Hei)4-89498/1992; and WO 9315756), amidinophenyl-alanine derivatives (Thromb. Res., 17 , 425 (1980)), arginine ketoamide derivatives (WO 9408941), boron compound derivatives (For example, J. Biol. Chem., 265 , 18289 (1990), the Japanese Patent Unexamined Publication Nos. Hei 4-330094/1992 and (Hei)6-298795/1994, and WO 9425049). However, the derivatives have a problem in that they have low enzymatic selectivity among serine proteases belonging to thrombin homologue, in particular, trypsin. Guanidine derivatives (the Japanese Patent Unexamined Publication No. (Hei)6-25195/1994) and tetrasubstituted cyclohexylamine derivatives (WO 9425051) were reported as thrombin-specific inhibitors, however, their efficacy cannot be expected by oral administration. Disclosure of the Invention Under the above-described circumstances, the inventor of the present invention conducted various researches to find substances which have practically satisfactory enzyme selectivity, oral availability, and stability in vivo , and are structurally novel. As a result, they found that the penicillaminamide derivatives set out below have desired properties, and thus achieved the present invention. The present invention provides penicillaminamide derivatives represented by the following general formula (I) and salts thereof, and hydrates thereof and solvates thereof: wherein: n represents 1 or 2; R 1 represents a C 1 -C 10 alkyl group which may be substituted with a C 3 -C 10 cycloalkyl group or carboxyl group, a C 6 -C 10 aryl group a C 3 -C 10 cycloalkyl group or a C 7 -C 12 aralkyl group; R 2 represents hydrogen atom, a C 1 -C 10 alkyl group, a C 7 -C 12 aralkyl group, -COR 4 (wherein R 4 represents hydrogen atom, a C 1 -C 10 alkyl group, a C 1 -C 10 alkoxy group, a C 6 -C 10 aryl group a C 6 -C 10 aryloxy group, a C 3 -C 10 cycloalkyl group a C 3 -C 10 cycloalkyloxy group a C 7 -C 12 aralkyl group, or a C 7 -C 12 aralkyloxy group), or -SO 2 R 5 (wherein R 5 represents a C 1 -C 10 alkyl group, a C 6 -C 10 aryl group, a C 3 -C 10 cycloalkyl group, or a C 7 -C 12 aralkyl group), and in the above definitions of R 1 to R 5 the C 6 -C 10 aryl group, the C 3 -C 10 cycloalkyl group, the C 7 -C 12 aralkyl group, the C 6 -C 10 aryloxy group, the C 3 -C 10 cycloalkyloxy group, the C 7 -C 12 aralkyloxy group may be substituted with a functional group selected from the group consisting of a C 1 -C 6 alkyl group, a C 1 -C 6 haloalkyl group, a C 1 -C 6 alkoxy group, hydroxyl group, carboxyl group, a C 2 -C 7 carboxyalkyl group, a C 2 -C 7 carboxyalkyloxy group, a C 2 -C 7 acyl group, a C 2 -C 7 acyloxy group, a C 2 -C 7 alkoxycarbonyl group, a C 2 -C 7 alkoxycarbonyloxy group, a C 8 -C 10 aralkyloxycarbonyl group, a C 7 -C 9 alkoxycarbonylalkoxy group, and a halogen atom. R 3 represents amino group or amidino group, provided that the compounds wherein: R 1 represents methyl group, R 2 represents ethoxycarbonyl group, R 3 represents amino group, and n represents 1; R 1 represents methyl group, R 2 represents methylsulfonyl group, R 3 represents amino group, and n represents 1; R 1 represents ethyl group, R 2 represents methylsulfonyl group, R 3 represents amino group, and n represents 1; and R 1 represents isopropyl group, R 2 represents ethoxycarbonyl group, R 3 represents amidino group, and n represents 1 are excluded. According to other aspects of the present invention, there are provided medicament comprising a substance selected from the group consisting of the aforementioned penicillaminamide derivatives and salts thereof, and hydrates thereof and solvates thereof; and pharmaceutical compositions comprising a substance selected from the group consisting of the aforementioned penicillaminamide derivatives and salts thereof, and hydrates thereof and solvates thereof as an active ingredient, together with a pharmaceutically acceptable carrier. The aforementioned medicaments and pharmaceutical compositions are useful for preventive and/or therapeutic treatment of diseases caused by hyperfunction of protease activity, for example, they are useful as antithrombotic agents, i.e., orally available anticoagulant agents. Protease inhibitors comprising a substance selected from the group consisting of the aforementioned penicillaminamide derivatives and salts thereof, and hydrates thereof and solvates thereof are also provided according to further aspect of the present invention. According to still further aspects of the present invention, there are provided a use of a substance selected from the group consisting of the aforementioned penicillaminamide derivatives and salts thereof, and hydrates thereof and solvates thereof for the manufacture of the above-described pharmaceutical compositions; and a method for therapeutic treatment of a disease caused by hyperfunction of protease activity, which comprises a step of administering to a patient a therapeutically and/or preventively effective amount of a substance selected from the group consisting of the aforementioned penicillaminamide derivatives and salts thereof, and hydrates thereof and solvates thereof. Best Mode for Carrying Out the Invention The penicillaminamide derivatives of the present invention are represented by the formula (I) mentioned above. Examples of the C 1 -C 10 alkyl group in the above definition include, for example, methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group, s-butyl group, i-butyl group, t-butyl group, n-pentyl group, 1,1-dimethylpropyl group, neopentyl group, n-hexyl group, 1-methyl-1-ethylpropyl group, n-heptyl group, 1,1-diethylpropyl group, n-octyl group, n-nonyl group, and n-decyl group. Examples of the C 6 -C 10 aryl group include, for example, phenyl group, tolyl group, and naphthyl group. Examples of the C 3 -C 10 cycloalkyl group include, for examle, cyclopropyl group, cyclobutyl group, cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclooctyl group, cyclononyl group, and cyclodecyl group. Examples of the C 1 -C 10 alkoxy group include, for example, methoxy group, ethoxy group, n-propoxy group, i-propoxy group, n-butoxy group, s-butoxy group, i-butoxy group, t-butoxy group, n-pentyloxy group, neopentyloxy group, n-hexyloxy group, n-heptyloxy group, n-octyloxy group, n-nonyloxy group, and n-decyloxy group. Examples of the C 3 -C 10 cycloalkyloxy group include, for example, cyclopropyloxy group, cyclobutyloxy group, cyclopentyloxy group, cyclohexyloxy group, and cycloheptyloxy group. Examples of the C 7 -C 12 aralkyloxy group include, for example, benzyloxy group, phenylethyloxy group, phenylpropyloxy group, and naphthylmethyloxy group, and examples of the C 6 -C 10 aryloxy group include, for example, phenyloxy group, tolyloxy group, and naphthyloxy group. Examples of the C 7 -C 12 aralkyl group include, for example, benzyl group, phenylethyl group, phenylpropyl group, and naphthylmethyl group. When the definitions of the functional groups of the aforementioned general formula refer to "which may be substituted," examples of the substituents include, for example, a C 1 -C 6 alkyl group such as methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, s-butyl group, isobutyl group, t-butyl group, n-pentyl group, and n-hexyl group; a C 1 -C 6 haloalkyl group such as chloromethyl group, bromomethyl group, dichloromethyl group, 1-chloroethyl group, 2-chloroethyl group, 3-chloropropyl group, 4-chlorobutyl group, 5-chloropentyl group, 6-chlorohexyl group, difluoromethyl group, and trifluoromethyl group; a C 1 -C 6 alkoxy group such as methoxy group, ethoxy group, n-propoxy group, isopropoxy group, n-butoxy group, s-butoxy group, isobutyloxy group, t-butyloxy group, n-pentyloxy group, and n-hexyloxy group; hydroxyl group; carboxyl group; a C 2 -C 7 carboxyalkyl group such as carboxymethyl group, 2-carboxyethyl group, 3-carboxypropyl group, 4-carboxybutyl group, 5-carboxypentyl group, and 6-carboxyhexyl group; a C 2 -C 7 carboxyalkyloxy group such as carboxymethoxy group, 2-carboxyethoxy group, 3-carboxypropoxy group, 4-carboxybutyloxy group, 5-carboxypentyloxy group, and 6-carboxyhexyloxy group; a C 2 -C 7 acyl group such as acetyl group, propionyl group, butyryl group, isobutyryl group, valeryl group, isovaleryl group, pivaloyl group, hexanoyl group, and heptanoyl group; a C 2 -C 7 acyloxy group such as acetyloxy group, propionyloxy group, butyryloxy group, isobutyryloxy group, valeryloxy group, isovaleryloxy group, pivaloyloxy group, hexanoyloxy group, and heptanoyloxy group; a C 2 -C 7 alkoxycarbonyl group such as methoxycarbonyl group, ethoxycarbonyl group, n-propoxycarbonyl group, isopropoxycarbonyl group, n-butyloxycarbonyl group, s-butyloxycarbonyl group, isobutyloxycarbonyl group, t-butyloxycarbonyl group, n-pentyloxycarbonyl group, and n-hexyloxycarbonyl group; a C 2 -C 7 alkoxycarbonyloxy group such as methoxycarbonyloxy group, ethoxycarbonyloxy group, n-propoxycarbonyloxy group, isopropoxycarbonyloxy group, n-butyloxycarbonyloxy group, s-butyloxycarbonyloxy group, isobutyloxycarbonyloxy group, t-butyloxycarbonyloxy group, n-pentyloxycarbonyloxy group, and n-hexyloxycarbonyloxy group; a C 8 -C 10 aralkyloxycarbonyl group such as benzyloxycarbonyl group, phenylethyloxycarbonyl group, and phenylpropyloxycarbonyl group; a C 3 -C 9 alkoxycarbonylalkoxy group such as methoxycarbonylmethoxy group, ethoxycarbonylmethoxy group, propoxycarbonylmethoxy group, methoxycarbonylethoxy group, ethoxycarbonylethoxy group, and propoxycarbonylethoxy group; a halogen atom such as fluorine atom, chlorine atom, and bromine atom. Examples of preferred compounds of the present invention include the compounds of the general formula (I) wherein R 1 represents a C 4 -C 10 alkyl group, a C 6 -C 10 aryl group a C 3 -C 10 cycloalkyl group, or a C 7 -C 12 aralkyl group wherein the C 4 -C 10 alkyl group, the C 6 -C 10 aryl group, the C 3 -C 10 cycloalkyl group, the C 7 -C 12 aralkyl group may be substituted with a functional group, and R 3 represents amidino group. The compounds wherein R 3 represents amino group are also preferred. Examples of more preferred compounds include the compounds of the general formula (I) wherein R 2 represents hydrogen atom, a C 1 -C 10 alkyl group, a C 7 -C 12 aralkyl group, or -COR 4 wherein the C 1 -C 10 alkyl group and the C 7 -C 12 aralkyl group may be substituted with a functional group wherein R 4 has the same meaning as defined above. Examples of the most preferred compounds include the compounds of the general formula (I) wherein R 2 represents -COR 4 in which R 4 represents a C 1 -C 10 alkyl group, a C 1 -C 10 alkoxy group, a C 6 -C 10 aryl group , a C 6 -C 10 aryloxy group a C 3 -C 10 cycloalkyl group, a C 3 -C 10 cycloalkyloxy group, a C 7 -C 12 aralkyl group, or a C 7 -C 12 aralkyloxy group wherein the C 6 -C 10 aryl group, the C 6 -C 10 aryloxy group, the C 3 -C 10 cycloalkyl group, the C 3 -C 10 cycloalkyloxy group, the C 7 -C 12 aralkyl group, the C 7 -C 12 aralkyloxy group may be substituted with a functional group. The penicillaminamide derivatives represented by the above general formula (I) may have various stereostructures. For example, in view of an asymmetric carbon atom as an asymmetric center, their absolute configuration may be either in (S) or (R) configuration. they may also exist as racemates. Optical isomers or diastereoisomers in pure forms, or any mixtures of these isomers or racemates fall within the scope of the present invention. Examples of salts formed by the compounds of the present invention represented by the aforementioned general formula (I) include, for example, inorganic acid salts such as hydrochloride, hydrobromide, hydriodide, sulfate, nitrate, and phosphate, and organic acid salts such as succinate, oxalate, fumarate, maleate, lactate, tartrate, citrate, acetate, glycolate, methanesulfonate, and toluenesulfonate. When the penicillaminamide derivatives of the general formula (I) have a free carboxyl group, they can form salts with pharmaceutically acceptable bases. Examples of the salts include, for example, alkali metal salts, alkaline earth metal salts, ammonium salt, and alkylammonium salts. The penicillaminamide derivatives represented by the general formula (I) and salts thereof may form hydrates, or may form solvates with methanol, ethanol, isopropanol, acetone, ethyl acetate, methylene chloride or the like. These substances also fall within the scope of the present invention. Specific examples of the compounds of the present invention are shown below. In the table, Me represents methyl group, Et represents ethyl group, Ph represents phenyl group, n-Pr represents n-propyl group, i-Pr represents i-propyl group, Bu represents butyl group, n-Bu represents n-butyl group, i-Bu represents i-butyl group, s-Bu represents s-butyl group, cyclo-Hex represents cyclohexyl group, 4-F-Benzyl represents 4-fluorobenzyl group, and 4-OMe-Benzyl represents 4-methoxybenzyl group. Compound No. n R 1 R 2 R 3 1 1 -Me -H -NH 2 2 1 -Me -Me -NH 2 3 1 -Me -CH 2 Ph -NH 2 4 1 -Me -COCH 3 -NH 2 5 1 -Me -COO-n-Pr -NH 2 6 1 -Me -COO-i-Pr -NH 2 7 1 -Me -SO 2 Et -NH 2 8 1 -Et -H -NH 2 9 1 -Et -Me -NH 2 10 1 -Et -CH 2 Ph -NH 2 11 1 -Et -COCH 3 -NH 2 12 1 -Et -COOMe -NH 2 13 1 -Et -COOEt -NH 2 14 1 -Et -COO-n-Pr -NH 2 15 1 -Et -COO-i-Pr -NH 2 16 1 -Et -COO-n-Bu -NH 2 17 1 -Et -COO-i-Bu -NH 2 18 1 -Et -COO-t-Bu -NH 2 19 1 -Et -COO-n-C 5 H 11 -NH 2 20 1 -Et -COOCH 2 Ph -NH 2 21 1 -Et -COO-cyclo- -NH 2 Hex 22 1 -Et -SO 2 Et -NH 2 23 1 -Et -SO 2 Me -NH 2 24 1 -n-Pr -H -NH 2 25 1 -n-Pr -Me -NH 2 26 1 -n-Pr -CO 2 Ph -NH 2 27 1 -n-Pr -COCH 3 -NH 2 28 1 -n-Pr- CO-cyclo-Hex -NH 2 29 1 -n-Pr -COPh -NH 2 30 1 -n-Pr -COOMe -NH 2 31 1 -n-Pr -COOEt -NH 2 32 1 -n-Pr -COO-n-Pr -NH 2 33 1 -n-Pr -COO-i-Pr -NH 2 34 1 -n-Pr -COO-n-Bu -NH 2 35 1 -n-Pr -COO-i-Bu -NH 2 36 1 -n-Pr -COO-t-Bu -NH 2 37 1 -n-Pr -COO-n-C 5 H 11 -NH 2 38 1 -n-Pr -COOCH 2 Ph -NH 2 39 1 -n-Pr -SO 2 Me -NH 2 40 1 -n-Pr -SO 2 Et -NH 2 41 1 -n-Pr -SO 2 -I-Pr -NH 2 42 1 -n-Pr -SO 2 Ph -NH 2 43 1 -i-Pr -H -NH 2 44 1 -i-Pr -Me -NH 2 45 1 -i-Pr -CH 2 Ph -NH 2 46 1 -i-Pr -COCH 3 -NH 2 47 1 -i-Pr -CO-cyclo-Hex -NH 2 48 1 -i-Pr -COPh -NH 2 49 1 -i-Pr -COOMe -NH 2 50 1 -i-Pr -COOEt -NH 2 51 1 -i-Pr -COO-n-Pr -NH 2 52 1 -i-Pr -COO-i-Pr -NH 2 53 1 -i-Pr -COO-n-Bu -NH 2 54 1 -i-Pr -COO-i-Bu -NH 2 55 1 -i-Pr -COO-t-Bu -NH 2 56 1 -i-Pr -COO-n-C 5 H 11 -NH 2 57 1 -i-Pr -COO-cyclo- -NH 2 Hex 58 1 -i-Pr -COOCH 2 Ph -NH 2 59 1 -i-Pr -SO 2 Me -NH 2 60 1 -i-Pr -SO 2 Et -NH 2 61 1 -i-Pr -SO 2 -i-Pr -NH 2 62 1 -i-Pr -SO 2 Ph -NH 2 63 1 cyclopropyl- -H -NH 2 64 1 cyclopropyl- -Me -NH 2 65 1 cyclopropyl- -CH 2 Ph -NH 2 66 1 cyclopropyl- -COCH 3 -NH 2 67 1 cyclopropyl- -SO 2 Me -NH 2 68 1 cyclopropyl- -COOEt -NH 2 69 1 cyclopropyl- -COO-i-Pr -NH 2 70 1 cyclopropyl- -COOMe -NH 2 71 1 -n-Bu -H -NH 2 72 1 -n-Bu -Me -NH 2 73 1 -n-Bu -CH 2 Ph -NH 2 74 1 -n-Bu -COCH 3 -NH 2 75 1 -n-Bu -CO-cyclo-Hex -NH 2 76 1 -n-Bu -COPh -NH 2 77 1 -n-Bu -COOMe -NH 2 78 1 -n-Bu -COOEt -NH 2 79 1 -n-Bu -COO-n-Pr -NH 2 80 1 -n-Bu -COO-i-Pr -NH 2 81 1 -n-Bu -COO-n-Bu -NH 2 82 1 -n-Bu -COO-i-Bu -NH 2 83 1 -n-Bu -COO-t-Bu -NH 2 84 1 -n-Bu -COO-n-C 5 H 11 -NH 2 85 1 -n-Bu -COOCH 2 Ph -NH 2 86 1 -n-Bu -SO 2 Me -NH 2 87 1 -n-Bu -SO 2 Et -NH 2 88 1 -n-Bu -SO 2 -i-Pr -NH 2 89 1 -n-Bu -SO 2 Ph -NH 2 90 1 -i-Bu -H -NH 2 91 1 -i-Bu -Me -NH 2 92 1 -i-Bu -CH 2 Ph -NH 2 93 1 -i-Bu -COCH 3 -NH 2 94 1 -i-Bu -CO-cyclo-Hex -NH 2 95 1 -i-Bu -COPh -NH 2 96 1 -i-Bu -COOMe -NH 2 97 1 -i-Bu -COOEt -NH 2 98 1 -i-Bu -COO-n-Pr -NH 2 99 1 -i-Bu -COO-i-Pr -NH 2 100 1 -i-Bu -COO-n-Bu -NH 2 101 1 -i-Bu -COO-i-Bu -NH 2 102 1 -i-Bu -COO-t-Bu -NH 2 103 1 -i-Bu -COO-n-C 5 H 11 -NH 2 104 1 -i-Bu -COO-cyclo- -NH 2 Hex 105 1 -i-Bu -COOCH 2 Ph -NH 2 106 1 -i-Bu -SO 2 Me -NH 2 107 1 -i-Bu -SO 2 Et -NH 2 108 1 -i-Bu -SO 2 -i-Pr -NH 2 109 1 -i-Bu -SO 2 Ph -NH 2 110 1 -s-Bu -H -NH 2 111 1 -s-Bu -Me -NH 2 112 1 -s-Bu -CH 2 Ph -NH 2 113 1 -s-Bu -COCH 3 -NH 2 114 1 -s-Bu -COOMe -NH 2 115 1 -s-Bu -COOEt -NH 2 116 1 -s-Bu -COO-i-Pr -NH 2 117 1 -s-Bu -SO 2 Me -NH 2 118 1 -cyctobutyl -H -NH 2 119 1 -cyclobutyl -Me -NH 2 120 1 -cyclobutyl -CH 2 Ph -NH 2 121 1 -cyclobutyl -COCH 3 -NH 2 122 1 -cyclobutyl -CO-cyclo-Hex -NH 2 123 1 -cyclobutyl -COPh -NH 2 124 1 -cyclobutyl -COOMe -NH 2 125 1 -cyclobutyl -COOEt -NH 2 126 1 -cyclobutyl -COO-n-Pr -NH 2 127 1 -cyclobutyl -COO-i-Pr -NH 2 128 1 -cyclobutyl -COO-n-Bu -NH 2 129 1 -cyclobutyl -COO-i-Bu -NH 2 130 1 -cyclobutyl -COO-t-Bu -NH 2 131 1 -cyclobutyl -COO-n-C 5 H 11 -NH 2 132 1 -cyclobutyl -COO-cyclo- -NH 2 Hex 133 1 -cyclobutyl -COOCH 2 Ph -NH 2 134 1 -cyclobutyl -SO 2 Me -NH 2 135 1 -cyclobutyl -SO 2 Et -NH 2 136 1 -cyclobutyl -SO 2 -i-Pr -NH 2 137 1 -cyclobutyl -SO 2 Ph -NH 2 138 1 -n-C 5 H 11 -H -NH 2 139 1 -n-C 5 H 11 -Me -NH 2 140 1 -n-C 5 H 11 -CH 2 Ph -NH 2 141 1 -n-C 5 H 11 -COCH 3 -NH 2 142 1 -n-C 5 H 11 -CO-cyclo-Hex -NH 2 143 1 -n-C 5 H 11 -COPh -NH 2 144 1 -n-C 5 H 11 -COOMe -NH 2 145 1 -n-C 5 H 11 -COOEt -NH 2 146 1 -n-C 5 H 11 -COO-n-Pr -NH 2 147 1 -n-C 5 H 11 -COO-i-Pr -NH 2 148 1 -n-C 5 H 11 -COO-n-Bu -NH 2 149 1 -n-C 5 H 11 -COO-i-Bu -NH 2 150 1 -n-C 5 H 11 -COO-t-Bu -NH 2 151 1 -n-C 5 H n -COO-n-C 5 H 11 -NH 2 152 1 -n-C 5 H 11 -COOCH 2 Ph -NH 2 153 1 -n-C 5 H 11 -SO 2 Me -NH 2 154 1 -n-C 5 H 11 -SO 2 Et -NH 2 155 1 -n-C 5 H 11 -SO 2 -i-Pr -NH 2 156 1 -n-C 5 H 11 -SO 2 Ph -NH 2 157 1 -cyclopentyl -H -NH 2 158 1 -cyclopentyl -Me -NH 2 159 1 -cyclopentyl -CH 2 Ph -NH 2 160 1 -cyclopentyl -COCH 3 -NH 2 161 1 -cyclopentyl -CO-cyclo-Hex -NH 2 162 1 -cyclopentyl -COPh -NH 2 163 1 -cyclopentyl -COOMe -NH 2 164 1 -cyclopentyl -COOEt -NH 2 165 1 -cyclopentyl -COO-n-Pr -NH 2 166 1 -cyclopentyl -COO-n-Bu -NH 2 167 1 -cyclopentyl -COO-i-Bu -NH 2 168 1 -cyclopentyl -COO-t-Bu -NH 2 169 1 -cyclopentyl -COO-n-C 5 H 11 -NH 2 170 1 -cyclopentyl -SO 2 Me -NH 2 171 1 -cyclopentyl -SO 2 Et -NH 2 172 1 -cyclopentyl -SO 2 -i-Pr -NH 2 173 1 -cyclopentyl -SO 2 Ph -NH 2 174 1 -CH(CH 2 CH 3 ) 2 -H -NH 2 175 1 -CH(CH 2 CH 3 ) 2 -Me -NH 2 176 1 -CH(CH 2 CH 3 ) 2 -CH 2 Ph -NH 2 177 1 -CH(CH 2 CH 3 ) 2 -COCH 3 -NH 2 178 1 -CH(CH 2 CH 3 ) 2 -CO-cyclo-Hex -NH 2 179 1 -CH(CH 2 CH 3 ) 2 -COPh -NH 2 180 1 -CH(CH 2 CH 3 ) 2 -COOMe -NH 2 181 1 -CH(CH 2 CH 3 ) 2 -COOEt -NH 2 182 1 -CH(CH 2 CH 3 ) 2 -COO-n-Pr -NH 2 183 1 -CH(CH 2 CH 3 ) 2 -COO-i-Pr -NH 2 184 1 -CH(CH 2 CH 3 ) 2 -COO-n-Bu -NH 2 185 1 -CH(CH 2 CH 3 ) 2 -COO-i-Bu -NH 2 186 1 -CH(CH 2 CH 3 ) 2 -COO-t-Bu -NH 2 187 1 -CH(CH 2 CH 3 ) 2 -COO-n-C 5 H 11 -NH 2 188 1 -CH(CH 2 CH 3 ) 2 -SO 2 Me -NH 2 189 1 -CH(CH 2 CH 3 ) 2 -SO 2 Et -NH 2 190 1 -CH(CH 2 CH 3 ) 2 -SO 2 -i-Pr -NH 2 191 1 -CH(CH 2 CH 3 ) 2 -SO 2 Ph -NH 2 192 1 -cyclohexyl -H -NH 2 193 1 -cyclohexyl -Me -NH 2 194 1 -cyclohexyl -CH 2 Ph -NH 2 195 1 -cyclohexyl -COCH 3 -NH 2 196 1 -cyclohexyl -COOMe -NH 2 197 1 -cyclohexyl -COOEt -NH 2 198 1 -cyclohexyl -COO-i-Pr -NH 2 199 1 -cyclohexyl -SO 2 Me -NH 2 200 1 -cyclohexyl -SO 2 -i-Pr -NH 2 201 1 -Ph -H -NH 2 202 1 -Ph -Me -NH 2 203 1 -Ph -CH 2 Ph -NH 2 204 1 -Ph -COCH 3 -NH 2 205 1 -Ph -COOMe -NH 2 206 1 -Ph -COOEt -NH 2 207 1 -Ph -COO-i-Pr -NH 2 208 1 -Ph -SO 2 Me -NH 2 209 1 -Ph -SO 2 -i-Pr -NH 2 210 1 -Benzyl -H -NH 2 211 1 -Benzyl -Me -NH 2 212 1 -Benzyl -CH 2 Ph -NH 2 213 1 -Benzyl -COCH 3 -NH 2 214 1 -Benzyl -COOEt -NH 2 215 1 -Benzyl -COO-n-Pr -NH 2 216 1 -Benzyl -COO-i-Pr -NH 2 217 1 -Benzyl -SO 2 Me -NH 2 218 1 4-F-Benzyl- -H -NH 2 219 1 4-F-Benzyl- -Me -NH 2 220 1 4-F-Benzyl- -CH 2 Ph -NH 2 221 1 4-F-Benzyl- -COCH 3 -NH 2 222 1 4-F-Benzyl- -COOMe -NH 2 223 1 4-F-Benzyl- -COOEt -NH 2 224 1 4-F-Benzyl- -COO-i-Pr -NH 2 225 1 4-F-Benzyl- -SO 2 Me -NH 2 226 1 4-OMe-Benzyl- -H -NH 2 227 1 4-OMe-Benzyl- -Me -NH 2 228 1 4-OMe-Benzyl- -CH 2 Ph -NH 2 229 1 4-OMe-Benzyl- -COCH 3 -NH 2 230 1 4-OMe-Benzyl- -COOMe -NH 2 231 1 4-OMe-Benzyl- -COOEt -NH 2 232 1 4-OMe-Benzyl- -COO-i-Pr -NH 2 233 1 4-OMe-Benzyl- -SO 2 Me -NH 2 234 1 -CH 2 -cyclo-Hex -H -NH 2 235 1 -CH 2 -cyclo-Hex -Me -NH 2 236 1 -CH 2 -cyclo-Hex -CH 2 Ph -NH 2 237 1 -CH 2 -cyclo-Hex -COCH 3 -NH 2 238 1 -CH 2 -cyclo-Hex -COOMe -NH 2 239 1 -CH 2 -cyclo-Hex -COOEt -NH 2 240 1 -CH 2 -cyclo-Hex -COO-i-Pr -NH 2 241 1 -CH 2 -cyclo-Hex -COO-n-Pr -NH 2 242 1 -CH 2 -cyclo-Hex -SO 2 Me -NH 2 243 1 -CH 2 C(CH 3 ) 3 -H -NH 2 244 1 -CH 2 C(CH 3 ) 3 -Me -NH 2 245 1 -CH 2 C(CH 3 ) 3 -CH 2 Ph -NH 2 246 1 -CH 2 C(CH 3 ) 3 -COCH 3 -NH 2 247 1 -CH 2 C(CH 3 ) 3 -COOEt -NH 2 248 1 -CH 2 C(CH 3 ) 3 -COO-n-Pr -NH 2 249 1 -CH 2 C(CH 3 ) 3 -COO-i-Pr -NH 2 250 1 -CH 2 C(CH 3 ) 3 -SO 2 Me -NH 2 251 1 -(CH 2 ) 2 CH(CH 3 ) 2 -H -NH 2 252 1 -(CH 2 ) 2 CH(CH 3 ) 2 -Me -NH 2 253 1 -(CH 2 ) 2 CH(CH 3 ) 2 -COCH 3 -NH 2 254 1 -(CH 2 ) 2 CH(CH 3 ) 2 -COOEt -NH 2 255 1 -(CH 2 ) 2 CH(CH 3 ) 2 -COO-n-Pr -NH 2 256 1 -(CH 2 ) 2 CH(CH 3 ) 2 -COO-i-Pr -NH 2 257 1 -(CH 2 ) 2 CH(CH 3 ) 2 -SO 2 Me -NH 2 258 2 -Me -H -NH 2 259 2 -Me -Me -NH 2 260 2 -Me -COCH 3 -NH 2 261 2 -Me -COOMe -NH 2 262 2 -Me -COOEt -NH 2 263 2 -Me -COO-i-Pr -NH 2 264 2 -Me -SO 2 Me -NH 2 265 2 -Et -H -NH 2 266 2 -Et -Me -NH 2 267 2 -Et -COCH 3 -NH 2 268 2 -Et -COOMe -NH 2 269 2 -Et -COOEt -NH 2 270 2 -Et -COO-n-Pr -NH 2 271 2 -Et -COO-i-Pr -NH 2 272 2 -Et -COO-n-Bu -NH 2 273 2 -Et -COO-i-Bu -NH 2 274 2 -Et -COO-t-Bu -NH 2 275 2 -Et -SO 2 Me -NH 2 276 2 -n-Pr -H -NH 2 277 2 -n-Pr -Me -NH 2 278 2 -n-Pr -COCH 3 -NH 2 279 2 -n-Pr -COOMe -NH 2 280 2 -n-Pr -COOEt -NH 2 281 2 -n-Pr -COO-n-Pr -NH 2 282 2 -n-Pr -COO-i-Pr -NH 2 283 2 -n-Pr -COO-n-Bu -NH 2 284 2 -n-Pr -COO-t-Bu -NH 2 285 2 -n-Pr -COO-i-Bu -NH 2 286 2 -n-Pr -SO 2 Me -NH 2 287 2 -i-Pr -H -NH 2 288 2 -i-Pr -Me -NH 2 289 2 -i-Pr -COCH 3 -NH 2 290 2 -i-Pr -COOMe -NH 2 291 2 -i-Pr -COOEt -NH 2 292 2 -i-Pr -COO-n-Pr -NH 2 293 2 -i-Pr -COO-i-Pr -NH 2 294 2 -i-Pr -COO-n-Bu -NH 2 295 2 -i-Pr -COO-i-Bu -NH 2 296 2 -i-Pr -COO-t-Bu -NH 2 297 2 -i-Pr -SO 2 Me -NH 2 298 2 -n-Bu -H -NH 2 299 2 -n-Bu -Me -NH 2 300 2 -n-Bu -COCH 3 -NH 2 301 2 -n-Bu -COOMe -NH 2 302 2 -n-Bu -COOEt -NH 2 303 2 -n-Bu -COO-n-Pr -NH 2 304 2 -n-Bu -COO-i-Pr -NH 2 305 2 -n-Bu -COO-n-Bu -NH 2 306 2 -n-Bu -COO-i-Bu -NH 2 307 2 -n-Bu -COO-t-Bu -NH 2 308 2 -n-Bu -SO 2 Me -NH 2 309 2 -i-Bu -H -NH 2 310 2 -i-Bu -Me -NH 2 311 2 -i-Bu -COCH 3 -NH 2 312 2 -i-Bu -COOMe -NH 2 313 2 -i-Bu -COOEt -NH 2 314 2 -i-Bu -COO-n-Pr -NH 2 315 2 -i-Bu -COO-i-Pr -NH 2 316 2 -i-Bu -COO-n-Bu -NH 2 317 2 -i-Bu -COO-i-Bu -NH 2 318 2 -i-Bu -COO-t-Bu -NH 2 319 2 -i-Bu -SO 2 Me -NH 2 320 2 -cyclobutyl -H -NH 2 321 2 -cyclobutyl -Me -NH 2 322 2 -cyclobutyl -COCH 3 -NH 2 323 2 -cyclobutyl -COOMe -NH 2 324 2 -cyclobutyl -COOEt -NH 2 325 2 -cyclobutyl -COO-n-Pr -NH 2 326 2 -cyclobutyl -COO-i-Pr -NH 2 327 2 -cyclobutyl -COO-t-Bu -NH 2 328 2 -cyclobutyl -SO 2 Me -NH 2 329 2 -cyclopentyl -H -NH 2 330 2 -cyclopentyl -Me -NH 2 331 2 -cyclopentyl -COCH 3 -NH 2 332 2 -cyclopentyl -COOMe -NH 2 333 2 -cyclopentyl -COOEt -NH 2 334 2 -cyclopentyl -COO-n-Pr -NH 2 335 2 -cyclopentyl -COO-i-Pr -NH 2 336 2 -cyclopentyl -COO-t-Bu -NH 2 337 2 -Benzyl -H -NH 2 338 2 -Benzyl -Me -NH 2 339 2 -Benzyl -COCH 3 -NH 2 340 2 -Benzyl -COOMe -NH 2 341 2 -Benzyl -COOEt -NH 2 342 2 -Benzyl -COO-n-Pr -NH 2 343 2 -Benzyl -COO-i-Pr -NH 2 344 2 -Benzyl -COO-t-Bu -NH 2 345 2 -Benzyl -SO 2 Me -NH 2 346 2 -CH 2 C(CH 3 ) 3 -H -NH 2 347 2 -CH 2 C(CH 3 ) 3 -Me -NH 2 348 2 -CH 2 C(CH 3 ) 3 -COCH 3 -NH 2 349 2 -CH 2 C(CH 3 ) 3 -COOMe -NH 2 350 2 -CH 2 C(CH 3 ) 3 -COOEt -NH 2 351 2 -CH 2 C(CH 3 ) 3 -COO-n-Pr -NH 2 352 2 -CH 2 C(CH 3 ) 3 -COO-i-Pr -NH 2 353 2 -CH 2 C(CH 3 ) 3 -COO-t-Bu -NH 2 354 2 -CH 2 C(CH 3 ) 3 -SO 2 Me -NH 2 355 2 -CH(CH 2 CH 3 ) 2 -H -NH 2 356 2 -CH(CH 2 CH 3 ) 2 -Me -NH 2 357 2 -CH(CH 2 CH 3 ) 2 -COCH 3 -NH 2 358 2 -CH(CH 2 CH 3 ) 2 -COOMe -NH 2 359 2 -CH(CH 2 CH 3 ) 2 -COOEt -NH 2 360 2 -CH(CH 2 CH 3 ) 2 -COO-n-Pr -NH 2 361 2 -CH(CH 2 CH 3 ) 2 -COO-i-Pr -NH 2 362 2 -CH(CH 2 CH 3 ) 2 -COO-t-Bu -NH 2 363 2 -CH(CH 2 CH 3 ) 2 -SO 2 Me -NH 2 364 1 -Me -H -C(NH 2 )=NH 365 1 -Me -Me -C(NH 2 )=NH 366 1 -Me -CH 2 Ph -C(NH 2 )=NH 367 1 -Me -COCH 3 -C(NH 2 )=NH 368 1 -Me -COO-n-Pr -C(NH 2 )=NH 369 1 -Me -COO-i-Pr -C(NH 2 )=NH 370 1 -Me -SO 2 Me -C(NH 2 )=NH 371 1 -Et -H -C(NH 2 )=NH 372 1 -Et -Me -C(NH 2 )=NH 373 1 -Et -CH 2 Ph -C(NH 2 )=NH 374 1 -Et -COCH 3 -C(NH 2 )=NH 375 1 -Et -COOMe -C(NH 2 )=NH 376 1 -Et -COOEt -C(NH 2 )=NH 377 1 -Et -COO-n-Pr -C(NH 2 )=NH 378 1 -Et -COO-i-Pr -C(NH 2 )=NH 379 1 -Et -COO-n-Bu -C(NH 2 )=NH 380 1 -Et -COO-i-Bu -C(NH 2 )=NH 381 1 -Et -COO-t-Bu -C(NH 2 )=NH 382 1 -Et -COO-n-C 5 H 11 -C(NH 2 )=NH 383 1 -Et -COOCH 2 Ph -C(NH 2 )=NH 384 1 -Et -SO 2 Me -C(NH 2 )=NH 385 1 -Et -SO 2 Et -C(NH 2 )=NH 386 1 -Et -SO 2 -i-Pr -C(NH 2 )=NH 387 1 -n-Pr -H -C(NH 2 )=NH 388 1 -n-Pr -Me -C(NH 2 )=NH 389 1 -n-Pr -CH 2 Ph -C(NH 2 )=NH 390 1 -n-Pr -COCH 3 -C(NH 2 )=NH 391 1 -n-Pr -COPh -C(NH 2 )=NH 392 1 -n-Pr -COOMe -C(NH 2 )=NH 393 1 -n-Pr -COOEt -C(NH 2 )=NH 394 1 -n-Pr -COO-n-Pr -C(NH 2 )=NH 395 1 -n-Pr -COO-i-Pr -C(NH 2 )=NH 396 1 -n-Pr -COO-n-Bu -C(NH 2 )=NH 397 1 -n-Pr -COO-i-Bu -C(NH 2 )=NH 398 1 -n-Pr -COO-t-Bu -C(NH 2 )=NH 399 1 -n-Pr -COO-n-C 5 H 11 -C(NH 2 )=NH 400 1 -n-Pr -COOCH 2 Ph -C(NH 2 )=NH 401 1 -n-Pr -SO 2 Me -C(NH 2 )=NH 402 1 -n-Pr -SO 2 Et -C(NH 2 )=NH 403 1 -n-Pr -SO 2 -i-Pr -C(NH 2 )=NH 404 1 -n-Pr -SO 2 Ph -C(NH 2 )=NH 405 1 -i-Pr -H -C(NH 2 )=NH 406 1 -i-Pr -Me -C(NH 2 )=NH 407 1 -i-Pr -CH 2 Ph -C(NH 2 )=NH 408 1 -i-Pr -COCH 3 -C(NH 2 )=NH 409 1 -i-Pr -COPh -C(NH 2 )=NH 410 1 -i-Pr -COO-n-Pr -C(NH 2 )=NH 411 1 -i-Pr -COO-i-Pr -C(NH 2 )=NH 412 1 -i-Pr -COO-n-Bu -C(NH 2 )=NH 413 1 -i-Pr -COO-i-Bu -C(NH 2 )=NH 414 1 -i-Pr -COO-t-Bu -C(NH 2 )=NH 415 1 -i-Pr -COO-n-C 5 H 11 -C(NH 2 )=NH 416 1 -i-Pr -COOCH 2 Ph -C(NH 2 )=NH 417 1 -i-Pr -SO 2 Me -C(NH 2 )=NH 418 1 -i-Pr -SO 2 Et -C(NH 2 )=NH 419 1 -i-Pr -COOMe -C(NH 2 )=NH 420 1 -i-Pr -SO 2 Ph -C(NH 2 )=NH 421 1 cyclopropyl- -H -C(NH 2 )=NH 422 1 cyclopropyl- -Me -C(NH 2 )=NH 423 1 cyclopropyl- -COCH 3 -C(NH 2 )=NH 424 1 cyclopropyl- -SO 2 Me -C(NH 2 )=NH 425 1 cyclopropyl- -COOEt -C(NH 2 )=NH 426 1 cyclopropyl- -COOMe -C(NH 2 )=NH 427 1 cyclopropyl- -COO-i-Pr -C(NH 2 )=NH 428 1 -n-Bu -H -C(NH 2 )=NH 429 1 -n-Bu -Me -C(NH 2 )=NH 430 1 -n-Bu -CH 2 Ph -C(NH 2 )=NH 431 1 -n-Bu -COCH 3 -C(NH 2 )=NH 432 1 -n-Bu -COPh -C(NH 2 )=NH 433 1 -n-Bu -COOMe -C(NH 2 )=NH 434 1 -n-Bu -COOEt -C(NH 2 )=NH 435 1 -n-Bu -COO-n-Pr -C(NH 2 )=NH 436 1 -n-Bu -COO-i-Pr -C(NH 2 )=NH 437 1 -n-Bu -COO-n-Bu -C(NH 2 )=NH 438 1 -n-Bu -COO-i-Bu -C(NH 2 )=NH 439 1 -n-Bu -COO-t-Bu -C(NH 2 )=NH 440 1 -n-Bu -COO-n-C 5 H 11 -C(NH 2 )=NH 441 1 -n-Bu -COOCH 2 Ph -C(NH 2 )=NH 442 1 -n-Bu -SO 2 Me -C(NH 2 )=NH 443 1 -n-Bu -SO 2 Et -C(NH 2 )=NH 444 1 -n-Bu -SO 2 -i-Pr -C(NH 2 )=NH 445 1 -n-Bu -SO 2 Ph -C(NH 2 )=NH 446 1 -i-Bu -H -C(NH 2 )=NH 447 1 -i-Bu -Me -C(NH 2 )=NH 448 1 -i-Bu -CH 2 Ph -C(NH 2 )=NH 449 1 -i-Bu -COCH 3 -C(NH 2 )=NH 450 1 -i-Bu -COPh -C(NH 2 )=NH 451 1 -i-Bu -COOMe -C(NH 2 )=NH 452 1 -i-Bu -COOEt -C(NH 2 )=NH 453 1 -i-Bu -COO-n-Pr -C(NH 2 )=NH 454 1 -i-Bu -COO-i-Pr -C(NH 2 )=NH 455 1 -i-Bu -COO-n-Bu -C(NH 2 )=NH 456 1 -i-Bu -COO-i-Bu -C(NH 2 )=NH 457 1 -i-Bu -COO-t-Bu -C(NH 2 )=NH 458 1 -i-Bu -COO-n-C 5 H 11 -C(NH 2 )=NH 459 1 -i-Bu -COOCH 2 Ph -C(NH 2 )=NH 460 1 -i-Bu -SO 2 Me -C(NH 2 )=NH 461 1 -i-Bu -SO 2 Et -C(NH 2 )=NH 462 1 -i-Bu -SO 2 -i-Pr -C(NH 2 )=NH 463 1 -i-Bu -SO 2 Ph -C(NH 2 )=NH 464 1 -cyclobutyl -H -C(NH 2 )=NH 465 1 -cyclobutyl -Me -C(NH 2 )=NH 466 1 -cyclobutyl -COCH 3 -C(NH 2 )=NH 467 1 -cyclobutyl -COOMe -C(NH 2 )=NH 468 1 -cyclobutyl -COOEt -C(NH 2 )=NH 469 1 -cyclobutyl -COO-n-Pr -C(NH 2 )=NH 470 1 -cyclobutyl -COO-i-Pr -C(NH 2 )=NH 471 1 -cyclobutyl -COO-n-Bu -C(NH 2 )=NH 472 1 -cyclobutyl -COO-i-Bu -C(NH 2 )=NH 473 1 -cyclobutyl -COO-t-Bu -C(NH 2 )=NH 474 1 -cyclobutyl -COO-n-C 5 H 11 -C(NH 2 )=NH 475 1 -cyclobutyl -COOCH 2 Ph -C(NH 2 )=NH 476 1 -cyclobutyl -SO 2 Me -C(NH 2 )=NH 477 1 -cyclobutyl -SO 2 -i-Pr -C(NH 2 )=NH 478 1 -cyclobutyl -SO 2 Ph -C(NH 2 )=NH 479 1 -n-C 5 H 11 -H -C(NH 2 )=NH 480 1 -n-C 5 H 11 -Me -C(NH 2 )=NH 481 1 -n-C 5 H 11 -COCH 3 -C(NH 2 )=NH 482 1 -n-C 5 H 11 -COOMe -C(NH 2 )=NH 483 1 -n-C 5 H 11 -COOEt -C(NH 2 )=NH 484 1 -n-C 5 H 11 -COO-n-Pr -C(NH 2 )=NH 485 1 -n-C 5 H 11 -COO-i-Pr -C(NH 2 )=NH 486 1 -n-C 5 H 11 -COO-n-Bu -C(NH 2 )=NH 487 1 -n-C 5 H 11 -COO-i-Bu -C(NH 2 )=NH 488 1 -n-C 5 H 11 -COO-t-Bu -C(NH 2 )=NH 489 1 -n-C 5 H 11 -COO-n-C 5 H 11 -C(NH 2 )=NH 490 1 -n-C 5 H 11 -COOCH 2 Ph -C(NH 2 )=NH 491 1 -n-C 5 H 11 -SO 2 Me -C(NH 2 )=NH 492 1 -n-C 5 H 11 -SO 2 Et -C(NH 2 )=NH 493 1 -n-C 5 H 11 -SO 2 -i-Pr -C(NH 2 )=NH 494 1 -n-C 5 H 11 -SO 2 Ph -C(NH 2 )=NH 495 1 -cyclopentyl -H -C(NH 2 )=NH 496 1 -cyclopentyl -Me -C(NH 2 )=NH 497 1 -cyclopentyl -COCH 3 -C(NH 2 )=NH 498 1 -cyclopentyl -COOMe -C(NH 2 )=NH 499 1 -cyclopentyl -COOEt -C(NH 2 )=NH 500 1 -cyclopentyl -COO-n-Pr -C(NH 2 )=NH 501 1 -cyclopentyl -COO-i-Pr -C(NH 2 )=NH 502 1 -cyclopentyl -COO-n-Bu -C(NH 2 )=NH 503 1 -cyclopentyl -COO-i-Bu -C(NH 2 )=NH 504 1 -cyclopentyl -COO-t-Bu -C(NH 2 )=NH 505 1 -cyclopentyl -COO-n-C 5 H 11 -C(NH 2 )=NH 506 1 -cyclopentyl -SO 2 Me -C(NH 2 )=NH 507 1 -cyclopentyl -SO 2 Et -C(NH 2 )=NH 508 1 -cyclopentyl -SO 2 -i-Pr -C(NH 2 )=NH 509 1 -cyclopentyl -SO 2 Ph -C(NH 2 )=NH 510 1 -CH(CH 2 CH 3 ) 2 -H -C(NH 2 )=NH 511 1 -CH(CH 2 CH 3 ) 2 -Me -C(NH 2 )=NH 512 1 -CH(CH 2 CH 3 ) 2 -COCH 3 -C(NH 2 )=NH 513 1 -CH(CH 2 CH 3 ) 2 -COOMe -C(NH 2 )=NH 514 1 -CH(CH 2 CH 3 ) 2 -COOEt -C(NH 2 )=NH 515 1 -CH(CH 2 CH 3 ) 2 -COO-n-Pr -C(NH 2 )=NH 516 1 -CH(CH 2 CH 3 ) 2 -COO-i-Pr -C(NH 2 )=NH 517 1 -CH(CH 2 CH 3 ) 2 -COO-n-Bu -C(NH 2 )=NH 518 1 -CH(CH 2 CH 3 ) 2 -COO-i-Bu -C(NH 2 )=NH 519 1 -CH(CH 2 CH 3 ) 2 -COO-t-Bu -C(NH 2 )=NH 520 1 -CH(CH 2 CH 3 ) 2 -COO-n-C 5 H 11 -C(NH 2 )=NH 521 1 -CH(CH 2 CH 3 ) 2 -SO 2 Me -C(NH 2 )=NH 522 1 -CH(CH 2 CH 3 ) 2 -SO 2 Et -C(NH 2 )=NH 523 1 -CH(CH 2 CH 3 ) 2 -SO 2 -i-Pr -C(NH 2 )=NH 524 1 -CH(CH 2 CH 3 ) 2 -SO 2 Ph -C(NH 2 )=NH 525 1 -Benzyl -H -C(NH 2 )=NH 526 1 -Benzyl -Me -C(NH 2 )=NH 527 1 -Benzyl -COCH 3 -C(NH 2 )=NH 528 1 -Benzyl -COOMe -C(NH 2 )=NH 529 1 -Benzyl -COOEt -C(NH 2 )=NH 530 1 -Benzyl -COO-n-Pr -C(NH 2 )=NH 531 1 -Benzyl -COO-i-Pr -C(NH 2 )=NH 532 1 -Benzyl -COO-n-Bu -C(NH 2 )=NH 533 1 -Benzyl -SO 2 Me -C(NH 2 )=NH 534 1 4-F-Benzyl- -H -C(NH 2 )=NH 535 1 4-F-Benzyl- -Me -C(NH 2 )=NH 536 1 4-F-Benzyl- -COCH 3 -C(NH 2 )=NH 537 1 4-F-Benzyl- -COOEt -C(NH 2 )=NH 538 1 4-F-Benzyl- -COO-n-Pr -C(NH 2 )=NH 539 1 4-F-Benzyl- -COO-i-Pr -C(NH 2 )=NH 540 1 4-F-Benzyl- -COO-n-Bu -C(NH 2 )=NH 541 1 4-F-Benzyl- -SO 2 Me -C(NH 2 )=NH 542 1 4-OMe-Benzyl- -H -C(NH 2 )=NH 543 1 4-OMe-Benzyl- -Me -C(NH 2 )=NH 544 1 4-OMe-Benzyl- -COCH 3 -C(NH 2 )=NH 545 1 4-OMe-Benzyl- -COOEt -C(NH 2 )=NH 546 1 4-OMe-Benzyl- -COO-n-Pr -C(NH 2 )=NH 547 1 4-OMe-Benzyl- -COO-i-Pr -C(NH 2 )=NH 548 1 4-OMe-Benzyl- -COO-n-Bu -C(NH 2 )=NH 549 1 4-OMe-Benzyl- -SO 2 Me -C(NH 2 )=NH 550 1 -CH 2 -cyclo-Hex -H -C(NH 2 )=NH 551 1 -CH 2 -cyclo-Hex -Me -C(NH 2 )=NH 552 1 -CH 2 -cyclo-Hex -COCH 3 -C(NH 2 )=NH 553 1 -CH 2 -cyclo-Hex -COOEt -C(NH 2 )=NH 554 1 -CH 2 -cyclo-Hex -COO-n-Pr -C(NH 2 )=NH 555 1 -CH 2 -cyclo-Hex -COO-i-Pr -C(NH 2 )=NH 556 1 -CH 2 -cyclo-Hex -COO-n-Bu -C(NH 2 )=NH 557 1 -CH 2 -cyclo-Hex -COO-i-Bu -C(NH 2 )=NH 558 1 -CH 2 -cyclo-Hex -SO 2 Me -C(NH 2 )=NH 559 1 -CH 2 C(CH 3 ) 3 -H -C(NH 2 )=NH 560 1 -CH 2 C(CH 3 ) 3 -Me -C(NH 2 )=NH 561 1 -CH 2 C(CH 3 ) 3 -COCH 3 -C(NH 2 )=NH 562 1 -CH 2 C(CH 3 ) 3 -COOEt -C(NH 2 )=NH 563 1 -CH 2 C(CH 3 ) 3 -COO-n-Pr -C(NH 2 )=NH 564 1 -CH 2 C(CH 3 ) 3 -COO-i-Pr -C(NH 2 )=NH 565 1 -CH 2 C(CH 3 ) 3 -COO-n-Bu -C(NH 2 )=NH 566 1 -CH 2 C(CH 3 ) 3 -COO-i-Bu -C(NH 2 )=NH 567 1 -CH 2 C(CH 3 ) 3 -SO 2 Me -C(NH 2 )=NH 568 1 -(CH 2 ) 2 CH(CH 3 ) 2 -H -C(NH 2 )=NH 569 1 -(CH 2 ) 2 CH(CH 3 ) 2 -Me -C(NH 2 )=NH 570 1 -(CH 2 ) 2 CH(CH 3 ) 2 -COCH 3 -C(NH 2 )=NH 571 1 -(CH 2 ) 2 CH(CH 3 ) 2 -COOEt -C(NH 2 )=NH 572 1 -(CH 2 ) 2 CH(CH 3 ) 2 -COO-n-Pr -C(NH 2 )=NH 573 1 -(CH 2 ) 2 CH(CH 3 ) 2 -COO-i-Pr -C(NH 2 )=NH 574 1 -(CH 2 ) 2 CH(CH 3 ) 2 -COO-n-Bu -C(NH 2 )=NH 575 1 -(CH 2 ) 2 CH(CH 3 ) 2 -COO-i-Bu -C(NH 2 )=NH 576 1 -(CH 2 ) 2 CH(CH 3 ) 2 -SO 2 Me -C(NH 2 )=NH 577 2 -Me -H -C(NH 2 )=NH 578 2 -Me -Me -C(NH 2 )=NH 579 2 -Me -COCH 3 -C(NH 2 )=NH 580 2 -Me -COOEt -C(NH 2 )=NH 581 2 -Me -COO-n-Pr -C(NH 2 )=NH 582 2 -Me -COO-i-Pr -C(NH 2 )=NH 583 2 -Me -COO-n-Bu -C(NH 2 )=NH 584 2 -Me -COO-i-Bu -C(NH 2 )=NH 585 2 -Me -SO 2 Me -C(NH 2 )=NH 586 2 -Et -H -C(NH 2 )=NH 587 2 -Et -Me -C(NH 2 )=NH 588 2 -Et -COCH 3 -C(NH 2 )=NH 589 2 -Et -COOEt -C(NH 2 )=NH 590 2 -Et -COO-n-Pr -C(NH 2 )=NH 591 2 -Et -COO-i-Pr -C(NH 2 )=NH 592 2 -Et -COO-n-Bu -C(NH 2 )=NH 593 2 -Et -COO-i-Bu -C(NH 2 )=NH 594 2 -Et -SO 2 Me -C(NH 2 )=NH 595 2 -n-Pr -H -C(NH 2 )=NH 596 2 -n-Pr -Me -C(NH 2 )=NH 597 2 -n-Pr -COCH 3 -C(NH 2 )=NH 598 2 -n-Pr -COOEt -C(NH 2 )=NH 599 2 -n-Pr -COO-n-Pr -C(NH 2 )=NH 600 2 -n-Pr -COO-i-Pr -C(NH 2 )=NH 601 2 -n-Pr -COO-n-Bu -C(NH 2 )=NH 602 2 -n-Pr -COO-i-Bu -C(NH 2 )=NH 603 2 -n-Pr -SO 2 Me -C(NH 2 )=NH 604 2 -i-Pr -H -C(NH 2 )=NH 605 2 -i-Pr -Me -C(NH 2 )=NH 606 2 -i-Pr -COCH 3 -C(NH 2 )=NH 607 2 -i-Pr -COOEt -C(NH 2 )=NH 608 2 -i-Pr -COO-n-Pr -C(NH 2 )=NH 609 2 -i-Pr -COO-i-Pr -C(NH 2 )=NH 610 2 -i-Pr -COO-n-Bu -C(NH 2 )=NH 611 2 -i-Pr -COO-i-Bu -C(NH 2 )=NH 612 2 -i-Pr -SO 2 Me -C(NH 2 )=NH 613 2 -n-Bu -H -C(NH 2 )=NH 614 2 -n-Bu -Me -C(NH 2 )=NH 615 2 -n-Bu -COCH 3 -C(NH 2 )=NH 616 2 -n-Bu -COOEt -C(NH 2 )=NH 617 2 -n-Bu -COO-n-Pr -C(NH 2 )=NH 618 2 -n-Bu -COO-i-Pr -C(NH 2 )=NH 619 2 -n-Bu -COO-n-Bu -C(NH 2 )=NH 620 2 -n-Bu -COO-i-Bu -C(NH 2 )=NH 621 2 -n-Bu -SO 2 Me -C(NH 2 )=NH 622 2 -i-Bu -H -C(NH 2 )=NH 623 2 -i-Bu -Me -C(NH 2 )=NH 624 2 -i-Bu -COCH 3 -C(NH 2 )=NH 625 2 -i-Bu -COOEt -C(NH 2 )=NH 626 2 -i-Bu -COO-n-Pr -C(NH 2 )=NH 627 2 -i-Bu -COO-i-Pr -C(NH 2 )=NH 628 2 -i-Bu -COO-n-Bu -C(NH 2 )=NH 629 2 -i-Bu -COO-i-Bu -C(NH 2 )=NH 630 2 -i-Bu -SO 2 Me -C(NH 2 )=NH 631 2 -cyclobutyl -H -C(NH 2 )=NH 632 2 -cyclobutyl -Me -C(NH 2 )=NH 633 2 -cyclobutyl -COCH 3 -C(NH 2 )=NH 634 2 -cyclobutyl -COOEt -C(NH 2 )=NH 635 2 -cyclobutyl -COO-n-Pr -C(NH 2 )=NH 636 2 -cyclobutyl -COO-i-Pr -C(NH 2 )=NH 637 2 -cyclobutyl -COO-n-Bu -C(NH 2 )=NH 638 2 -cyclobutyl -COO-i-Bu -C(NH 2 )=NH 639 2 -cyclobutyl -SO 2 Me -C(NH 2 )=NH 640 2 -cyclopentyl -H -C(NH 2 )=NH 641 2 -cyclopentyl -Me -C(NH 2 )=NH 642 2 -cyclopentyl -COCH 3 -C(NH 2 )=NH 643 2 -cyclopentyl -COOEt -C(NH 2 )=NH 644 2 -cyclopentyl -COO-n-Pr -C(NH 2 )=NH 645 2 -cyclopentyl -COO-i-Pr -C(NH 2 )=NH 646 2 -cyclopentyl -COO-n-Bu -C(NH 2 )=NH 647 2 -cyclopentyl -COO-i-Bu -C(NH 2 )=NH 648 2 -cyclopentyl -SO 2 Me -C(NH 2 )=NH 649 2 -Benzyl -H -C(NH 2 )=NH 650 2 -Benzyl -Me -C(NH 2 )=NH 651 2 -Benzyl -COCH 3 -C(NH 2 )=NH 652 2 -Benzyl -COOEt -C(NH 2 )=NH 653 2 -Benzyl -COO-n-Pr -C(NH 2 )=NH 654 2 -Benzyl -COO-i-Pr -C(NH 2 )=NH 655 2 -Benzyl -COO-n-Bu -C(NH 2 )=NH 656 2 -Benzyl -COO-i-Bu -C(NH 2 )=NH 657 2 -Benzyl -SO 2 Me -C(NH 2 )=NH 658 2 -i-Pr -H -C(NH 2 )=NH 659 2 -i-Pr -Me -C(NH 2 )=NH 660 2 -i-Pr -COCH 3 -C(NH 2 )=NH 661 2 -i-Pr -COOEt -C(NH 2 )=NH 662 2 -i-Pr -COO-n-Pr -C(NH 2 )=NH 663 2 -i-Pr -COO-i-Pr -C(NH 2 )=NH 664 2 -i-Pr -COO-n-Bu -C(NH 2 )=NH 665 2 -i-Pr -COO-i-Bu -C(NH 2 )=NH 666 2 -i-Pr -SO 2 Me -C(NH 2 )=NH 667 2 -CH(CH 2 CH 3 ) 2 -H -C(NH 2 )=NH 668 2 -CH(CH 2 CH 3 ) 2 -Me -C(NH 2 )=NH 669 2 -CH(CH 2 CH 3 ) 2 -COCH 3 -C(NH 2 )=NH 670 2 -CH(CH 2 CH 3 ) 2 -COOEt -C(NH 2 )=NH 671 2 -CH(CH 2 CH 3 ) 2 -COO-n-Pr -C(NH 2 )=NH 672 2 -CH(CH 2 CH 3 ) 2 -COO-i-Pr -C(NH 2 )=NH 673 2 -CH(CH 2 CH 3 ) 2 -COO-n-Bu -C(NH 2 )=NH 674 2 -CH(CH 2 CH 3 ) 2 -COO-i-Bu -C(NH 2 )=NH 675 2 -CH(CH 2 CH 3 ) 2 -SO 2 Me -C(NH 2 )=NH The methods for the preparation of the compounds of the present invention will be explained below. The compounds of the present invention can be prepared by combinations of reactions suitable to obtain respective desired compounds. Typical reaction schemes are exemplified below, however, the methods are not limited to those described below. In the above schemes, R 1 , R 2 and n have the same meanings as those defined above, and P and Q represent a protective group for amino group such as benzyloxycarbonyl group and t-butyloxycarbonyl group. In the above schemes, a known method for amide synthesis may be used for the preparations of the compounds of formulas (IV), (VII), (IX), and (XI). Examples of applicable methods include, for example, methods using a dehydration-condensing agent such as dicyclohexylcarbodiimide, 1-ethyl-3-(dimethylaminopropyl)-carbodiimide, and carbonyldiimidazole, the azide methods, the acid halide methods, the acid anhydride methods, the activated ester methods and the like (see, for example, "Jikken Kagaku Koza," 4th edition, Vol. 22, Organic Syntheses IV, p.259- (1992), Ed. by the Chemical Society of Japan, Maruzen). The reactions may be performed in an inert solvent such as tetrahydrofuran, diethyl ether, and dichloromethane under cooling, at room temperature, or with heating in a conventional manner. In the above reaction schemes, the compounds of formula (V), the compounds of formula (I) in Reaction Scheme 1, and the compounds of formula (X) can be synthesized by carrying out a deprotection reaction according to a method known in the field of peptide chemistry (see, for example, Nobuo, Izumiya et al., "Fundamentals and Experiments of Peptide Syntheses," Maruzen). The compound of formula (I) in Reaction Scheme 2 may be prepared by subjecting an imidate compound, obtained by treating the compound of formula (XI) with an alcohol and an inorganic acid such as hydrochloric acid, to reaction with ammonia or ammonium salt, or alternatively, by subjecting a thioamide compound, obtained by treating the compound of formula (XI) with hydrogen disulfide in the presence of an organic base such as triethylamine or pyridine, to reaction with a lower alkyl halide compound such as methyl iodide, and then reacting the resulting thioimidate compound with ammonia or ammonium salt. Each of the compounds obtained as described above can be isolated and purified by conventional chemical techniques such as, for example, extraction, crystallization, recrystallization, or various chromatographic processes. When the compound of the present invention are used as medicaments, the compound, per se, may be used. Generally, however, it is preferable that the compound is used in the form of a pharmaceutical composition comprising the compound of the present invention as an active ingredient together with a pharmaceutically acceptable additive. A ratio of the active ingredient to the pharmaceutically acceptable additive may vary in the range of, for example, from 1 to 90% by weight. As pharmaceutical compositions comprising the compound of the present invention, for example, compositions for oral administration such as granules, fine granules, powders, tablets, hard capsules, soft capsules, syrups, emulsions, suspensions, and liquid drugs may be administered, or alternatively, injections can be administered intravenously, intramuscularly, or subcutaneously. The compositions can be used also as suppositories. The compositions can also be provided as powders for injection and use as injections prepared upon use. As the pharmaceutically acceptable additives, solid or liquid, and organic or inorganic carriers and diluents for pharmaceutical preparations suitable for oral, enteral, or parenteral administration may be used. As excipients used for the preparation of solid pharmaceutical compositions, for example, lactose, saccharose, starch, talc, cellulose, dextrin, china clay, calcium carbonate and the like may be used. Liquid compositions for oral administration such as emulsions, syrups, suspensions, or solutions may contain conventionally-used inert diluents such as water or vegetable oils. These liquid compositions may contain, in addition to the inert diluents, for example, auxiliaries such as moistening agents, suspending aids, sweeteners, aromatics, colorants and preservatives. Liquid compositions thus prepared may be encapsulated into capsules made of an absorbable material such as gelatin. Examples of solvents or suspension mediums used for preparation of the pharmaceutical compositions for parenteral administration such as injections, suppositories and the like include, for example, water, propylene glycol, polyethylene glycol, benzyl alcohol, ethyl oleate, and lecithin. Base materials used for suppositories include, for example, cacao butter, emulsified cacao butter, lauric lipid, and Witepsol. Those pharmaceutical compositions can be manufactured by conventional methods. Clinical dose for oral administration may generally be 0.01-1000 mg, preferably 10-1000 mg per day for an adult as a weight of the compound of the present invention. However, it is further preferable that the dose may be appropriately increased or decreased depending on age, conditions, and symptoms of a patient. The daily dose of the medicament of the present invention can be administered once a day, or alternatively, two or three times a day with appropriate intervals as divided portions. The dose may be administered intermittently. When the medicaments are used as injections, it is desirable that a single dose of 0.001-100 mg for adult as a weight of the compound of the present invention is administered continuously or intermittently. Examples The present invention will be explained more specifically by referring to examples. However, the scope of the present invention is not limited to the following examples. In the examples below, the following ordinary abbreviations are used: THF: tetrahydrofuran; DMF: N,N-dimethylformamide; DMSO: dimethyl sulfoxide; CDI: carbonyldiimidazole; DPPA: diphenylphosphoryl azide; Z: benzyloxycarbonyl; and Boc: tertiary-butyloxycarbonyl. In the physicochemical data, NMR represents nuclear magnetic resonance spectrum, wherein values are shown as δ (delta) values in ppm which are ordinarily used for indicating chemical shifts. TMS (tetramethylsilane) was used as an internal standard. Parenthesized numbers following δ values indicate the numbers of hydrogen atoms, and as to symbols after the parenthesized number, "s" represents singlet; "d" represents doublet; "t" represents triplet; "q" represents quartet; "m" represents multiplet, and "br" represents a broad absorption peak. IR represents infrared absorption spectrum, and the spectrum was measured as a potassium bromide tablet unless otherwise specified. Numerical values are indicated as wave numbers in cm -1 . Only major absorption peaks are indicated. The symbol "mp" means melting point, and uncorrected values as °C are indicated. Example 1: Synthesis of trans-4-amino-[(S)-N-[(S)-2-propoxycarbonylamino-3-isopropylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 51 in Table 1) hydrochloride a) Trans-4-t-butoxycarbonylamino-benzyloxycarbonylaminomethylcyclohexane To a solution of trans-4-aminomethylcyclohexanecarboxylic acid (15.7 g, 100 mmol) and sodium hydroxide (4.0 g, 100 mmol) in water (30 ml), benzyloxycarbonyl chloride (15.6 ml, 110 mmol) and a solution of sodium hydroxide (4.4 g, 110 mmol) in water (30 ml) were simultaneously and slowly added dropwise at 0°C. After stirring was continued for four hours, the mixture was extracted once with ether, and 1N hydrochloric acid was added to the aqueous layer to adjust its pH to 2. The deposited white solid was collected by filtration and dried. Triethylamine (8.3 ml, 60 mmol) and DPPA (13.7 g, 50 mmol) were added to a solution of the above-obtained compound (12.8 g, 50 mmol) in t-butanol (150 ml), and the mixture was heated under reflux for eight hours. After the solvent was evaporated, the residue was added with water, and then the mixture was extracted with chloroform. The organic layer was washed once with 5% aqueous sodium carbonate, once with 5% aqueous acid potassium sulfate, twice with water, and then once with saturated brine. After the layer was dried over sodium sulfate, the solvent was evaporated. The residue was purified by silica gel column chromatography (hexane/ethyl acetate) to obtain the title compound a) (8.6 g, yield; 47%). NMR (CDCl 3 ): 0.85-1.37 (m, 14H), 1.60-1.85 (m, 4H), 2.84 (t, 1H), 3.12 (br, 1H), 5.00 (s, 2H), 6.62 (d, 1H), 7.23-7.39 (m, 6H) b) Trans-4-t-butoxycarbonylamino-[(S)-N-benzyloxycarbonylprolyl]aminomethylcyclohexane The compound obtained in a) (4.4 g, 12 mmol) was dissolved in methanol (200 ml), and the solution was subjected to catalytic reduction in the presence of palladium black (0.4 g) at ambient temperature under atmospheric pressure. After the completion of the reaction, the catalyst was removed by filtration, and the solvent was evaporated. CDI (2.0 g, 12 mmol) was added to a solution of (S)-Z-proline (3.0 g, 12 mmol) in THF (30 ml) at 0°C. After stirring was continued for three hours, the mixture was added with a solution of the above-obtained compound in THF (150 ml) at 0°C. After stirring for six hours, the solvent was evaporated, and the residue was added with water (50 ml). The mixture was extracted with chloroform, and the organic layer was washed three times with water and once with saturated brine. After the layer was dried with sodium sulfate, the solvent was evaporated. The residue was purified by silica gel chromatography (chloroform/methanol) to obtain the title compound b) (4.2 g, yield; 77%). NMR (CDCl 3 ): 0.85-1.06 (m, 4H), 1.44 (s, 9H), 1.60-2.35 (m, 9H), 2.94-3.20 (m, 2H), 3.20-3.55 (m, 3H), 4.31 (br, 1H), 4.47 (br, 1H), 5.14 (s, 2H), 6.90 (br, 1H), 7.15-7.40 (m, 5H) c) Trans-4-t-butoxycarbonylamino-[(S)-N-[(S)-2-propoxycarbonylamino-3-isopropylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane The compound obtained in b) (3.6 g 7.9 mmol) was dissolved in methanol (50 ml), and the solution was subjected to catalytic reduction in the presence of palladium black (0.3 g) at ambient temperature under atmospheric pressure. After the completion of the reaction, the catalyst was removed by filtration, and then the solvent was evaporated. The oily product obtained above, (S)-2-propoxycarbonylamino-3-isopropylthio-3-methylbutanoic acid (2.4 g, 8.7 mmol), and triethylamine (1.58 g, 15.6 mmol) were dissolved in dichloromethane (55 ml), and the solution was added dropwise with a solution of diethyl phosphorocyanidate (DEPC, 1.4 g, 8.7 mmol) in dichloromethane (10 ml) at 0°C. After the temperature was raised up to room temperature, the mixture was stirred for additional 24 hours and then added with water. The mixture was extracted twice with dichloromethane, and the organic layer was dried over sodium sulfate. After the solvent was evaporated, the resulting residue was purified by silica gel column chromatography (chloroform/methanol) to obtain the title compound c) (3.9 g, yield; 85%). NMR (CDCl 3 ): 7.18 (t, 1H), 5.59 (d, 1H), 4.61 (d, 1H), 4.34 (d, 2H), 4.20-3.85 (m, 3H), 3.72 (m, 1H), 3.33 (m, 1H), 3.90-3.20 (m, 3H), 2.37 (m, 1H), 2.10-0.90 (m, 14H), 1.47 (s, 3H), 1.43 (s, 9H), 1.40 (s, 3H), 1.29 (dd, 6H), 0.94 (t, 3H) d) Trans-4-amino-[(S)-N-[(S)-2-propoxycarbonylamino-3-isopropylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane hydrochloride A solution of the compound obtained in c) (3.9 g, 6.7 mmol) in chloroform (5 ml) was added dropwise with a 4N solution of hydrochloric acid in ethyl acetate (37 ml) at 0°C. After the mixture was stirred for one hour, the solvent was evaporated. The resulting residue was suspended and washed in ether, and then collected by filtration to obtain the title compound d) (3.1 g, yield; 90%). NMR (CDCl 3 ): 8.34 (br, 3H), 7.21 (t, 1H), 5.61 (d, 1H), 4.59 (d, 1H), 4.31 (d, 1H), 4.07-3.92 (m, 3H), 3.74 (m, 1H), 3.20-2.90 (m, 2H), 2.36 (m, 1H), 2.20-1.40 (m, 12H), 1.47 (s, 3H), 1.41 (s, 3H), 1.29 (dd, 6H), 0.95 (t, 3H), 1.10-0.90 (m, 2H) IR: 3344, 2974, 2876, 1689, 1637, 1527, 1448, 1313, 1240, 1060 In similar manners to those described above, the compounds of Examples 2-39 set out below were obtained. Example 2: Trans-4-amino-[(S)-N-[(S)-2-ethoxycarbonylamino-3-isopropylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 50 in Table 1) hydrochloride NMR (CDCl 3 ): 8.32 (br, 3H), 7.22 (t, 1H), 5.60 (d, 1H), 4.59 (m, 1H), 4.30 (d, 1H), 4.20-3.90 (m, 3H), 3.71 (m, 1H), 3.20-2.89 (m, 4H), 2.36 (m, 1H), 2.16 (m, 2H), 2.05 (m, 3H), 1.90-1.20 (m, 5H), 1.47 (s, 3H), 1.40 (s, 3H), 1.34-1.21 (m, 9H), 1.05-0.91 (m, 2H) IR: 3352, 2934, 2872, 1693, 1637, 1535, 1444, 1367, 1302, 1242 Example 3: Trans-4-amino-[(S)-N-[(S)-2-ethoxycarbonylamino-3-isobutylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 97 in Table 1) hydrochloride NMR (CDCl 3 ): 8.32 (br, 3H), 7.19 (t, 1H), 5.58 (d, 1H), 4.57 (d, 1H), 4.30 (d, 1H), 4.10 (m, 2H), 3.93 (m, 1H), 3.76 (m, 1H), 3.20-2.90 (m, 3H), 2.47-2.30 (m, 3H), 2.25-2.15 (m, 2H), 2.10-1.40 (m, 9H), 1.48 (s, 3H), 1.38 (s, 3H), 1.27 (t, 3H), 0.98 (dd, 6H), 1.05-0.90 (m, 2H) IR: 3354, 2957, 2868, 1691, 1639, 1535, 1444, 1386, 1242, 1055 Example 4: Trans-4-amino-[(S)-N-[(S)-2-isopropoxycarbonylamino-3-isopropylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 52 in Table 1) hydrochloride NMR (CDCl 3 ): 8.33 (br, 3H), 7.24 (t, 1H), 5.53 (d, 1H), 4.82 (m, 1H), 4.59 (m, 1H), 4.28 (d, 1H), 3.97 (m, 1H), 3.71 (m, 1H), 3.12-2.85 (m, 4H), 2.35 (m, 1H), 2.20 (m, 2H), 2.15-1.40 (m, 8H), 1.48 (s, 3H), 1.40 (s, 3H), 1.29 (dd, 6H), 1.26 (d, 6H), 1.10-0.90 (m, 2H) IR: 3344, 2935, 2866, 1685, 1637, 1523, 1446, 1242, 1111, 1043 Example 5: Trans-4-amino-[(S)-N-[(S)-2-methoxycarbonylamino-3-ethylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 12 in Table 1) hydrochloride NMR (CDCl 3 ): 8.31 (br, 3H), 7.19 (t, 1H), 5.68 (d, 1H), 4.57 (d, 1H), 4.35 (d, 1H), 3.91 (m, 1H), 3.74 (m, 1H), 3.69 (s, 3H), 3.22-2.94 (m, 3H), 2.70-2.45 (m, 3H), 2.40-1.40 (m, 10H), 1.44 (s, 3H), 1.39 (s, 3H), 1.21 (t, 3H), 1.10-0.90 (m, 2H) IR: 3383, 2935, 2872, 1701, 1637, 1541, 1448, 1298, 1244, 1057 Example 6: Trans-4-amino-[(S)-N-[(S)-2-methoxycarbonylamino-3-isopropylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 49 in Table 1) hydrochloride NMR (CDCl 3 ): 8.32 (br, 3H), 7.18 (t, 1H), 5.67 (d, 1H), 4.58 (d, 1H), 4.33 (d, 1H), 3.94 (m, 1H), 3.70 (m, 1H), 3.69 (s, 1H), 3.20-2.94 (m, 4H), 2.37 (m, 1H), 2.20-1.40 (m, 10H), 1.47 (s, 3H), 1.40 (s, 3H), 1.29 (dd, 6H), 1.10-0.90 (m, 2H) IR: 3356, 2934, 2868, 1701, 1643, 1535, 1446, 1300, 1242, 1053 Example 7: Trans-4-amino-[(S)-N-[(S)-2-methoxycarbonylamino-3-cyclopentylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 163 in Table 1) hydrochloride NMR (CDCl 3 ): 8.33 (br, 3H), 7.21 (t, 1H), 5.64 (d, 1H), 4.59 (d, 1H), 4.34 (d, 1H), 3.94 (m, 1H), 3.72 (m, 1H), 3.69 (s, 3H), 3.20-2.90 (m, 4H), 2.38 (m, 1H), 2.20-1.20 (m, 18H), 1.47 (s, 3H), 1.39 (s, 3H), 1.10-0.90 (m, 2H) IR: 3362, 2955, 2868, 1701, 1639, 1535, 1446, 1298, 1242, 1055 Example 8: Trans-4-amino-[(S)-N-[(S)-2-methylsulfonylamino-3-ethylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 23 in Table 1) hydrochloride NMR (CDCl 3 ): 8.13 (br, 3H), 6.99 (t, 1H), 5.97 (d, 1H), 4.52 (d, 1H), 4.25 (t, 1H), 4.15 (d, 1H), 4.03-3.81 (m, 2H), 3.20-2.90 (m, 3H), 3.08 (s, 3H), 2.70-2.50 (m, 2H), 2.50-1.40 (m, 10H), 1.42 (s, 3H), 1.39 (s, 3H), 1.29-1.16 (m, 3H), 1.10-0.90 (m, 2H) IR: 3383, 2934, 2866, 1637, 1543, 1450, 1317, 1151, 1035, 983 Example 9: Trans-4-amino-[(S)-N-[(S)-2-amino-3-ethylthio-3-methylbutanoyl]prolyl]-aminomethylcyclohexane (Compound No. 8 in Table 1) dihydrochloride NMR (CDCl 3 ): 8.72 (br, 3H), 8.31 (t, 1H), 8.18 (br, 3H), 4.44 (m, 1H), 4.27 (m, 1H), 4.06 (d, 1H), 3.83-3.60 (m, 4H), 3.13 (m, 1H), 3.04-2.87 (m, 2H), 2.61-2.52 (m, 2H), 2.24-1.40 (m, 8H), 1.47 (s, 3H), 1.42 (s, 3H), 1.29-1.22 (m, 3H), 1.10-0.90 (m, 2H) IR: 3476, 3285, 3084, 2941, 1647, 1493, 1446, 1346, 1116, 1049 Example 10: Trans-4-amino-[(S)-N-[(S)-2-methoxycarbonylamino-3-propylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 30 in Table 1) hydrochloride NMR (CDCl 3 ): 8.31 (br, 3H), 7.16 (t, 1H), 5.64 (d, 1H), 4.58 (d, 1H), 4.34 (d, 1H), 3.91 (m, 1H), 3.76 (m, 1H), 3.69 (s, 3H), 3.20-2.90 (m, 3H), 2.60-2.34 (m, 3H), 2.14 (m, 2H), 2.10-1.40 (m, 10H), 1.43 (s, 3H), 1.39 (s, 3H), 0.99 (t, 3H), 1.10-0.90 (m, 2H) IR: 3358, 2935, 2866, 1703, 1643, 1533, 1446, 1298, 1240, 1055 Example 11: Trans-4-amino-[(S)-N-[(S)-2-methoxycarbonylamino-3-isobutylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 96 in Table 1) hydrochloride NMR(CDCl 3 ): 8.33 (br, 3H), 7.16 (t, 1H), 5.64 (d, 1H), 4.57 (d, 1H), 4.33 (d, 1H), 3.91 (m, 1H), 3.75 (m, 1H), 3.69 (s, 3H), 3.20-2.90 (m, 3H), 2.50-2.30 (m, 3H), 2.15 (m, 2H), 2.10-1.40 (m, 9H), 1.42 (s, 3H), 1.38 (s, 3H), 0.98 (dd, 6H), 1.10-0.90 (m, 2H) IR: 3429, 2957, 2868, 1701, 1639, 1541, 1448, 1321, 1244, 1055 Example 12: Trans-4-amino-[(S)-N-[(S)-2-ethoxycarbonylamino-3-ethylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 13 in Table 1) hydrochloride NMR (CDCl 3 ): 8.33 (br, 3H), 7.17 (t, 1H), 5.57 (d, 1H), 4.57 (d, 1H), 4.33 (d, 1H), 4.22-4.05 (m, 2H), 3.91 (m, 1H), 3.82 (m, 1H), 3.20-2.90 (m, 3H), 2.70-2.50 (m, 2H), 2.36 (m, 1H), 2.22-1.40 (m, 10H), 1.44 (s, 3H), 1.39 (s, 3H), 1.27 (t, 3H), 1.22 (t, 3H), 1.20-0.90 (m, 2H) IR: 3354, 2934, 2872, 1701, 1637, 1523, 1444, 1298, 1242, 1057 Example 13: Trans-4-amino-[(S)-N-[(S)-2-ethoxycarbonylamino-3-propylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 31 in Table 1) hydrochloride NMR (CDCl 3 ): 8.33 (br, 3H), 7.18 (t, 1H), 5.57 (d, 1H), 4.58 (d, 1H), 4.32 (d, 1H), 4.22-4.05 (m, 2H), 3.96 (m, 1H), 3.76 (m, 1H), 3.20-2.90 (m, 3H), 2.60-2.47 (m, 2H), 2.36 (m, 1H), 2.25-1.40 (m, 12H), 1.49 (s, 3H), 1.43 (s, 3H), 1.30 (t, 3H), 1.00 (t, 3H), 1.16-0.91 (m, 2H) IR: 3441, 2939, 1641, 1533, 1442, 1300, 1242, 1192, 1170, 1055 Example 14: Trans-4-amino-[(S)-N-[(S)-2-ethoxycarbonylamino-3-cyclopentylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 164 in Table 1) hydrochloride NMR (CDCl 3 ): 8.32 (br, 3H), 7.23 (t, 1H), 5.60 (d, 1H), 4.59 (d, 1H), 4.31 (d, 1H), 4.17-4.02 (m, 2H), 3.95 (m, 1H), 3.71 (m, 1H), 3.22-2.94 (m, 4H), 2.36 (m, 1H), 2.26-1.40 (m, 18H), 1.47 (s, 3H), 1.39 (s, 3H), 1.27 (t, 3H), 1.10-0.90 (m, 2H) IR: 3346, 2939, 2868, 1695, 1641, 1533, 1444, 1300, 1240, 1055 Example 15: Trans-4-amino-[(S)-N-[(S)-2-ethoxycarbonylamino-3-phenylmethylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 214 in Table 1) hydrochloride NMR (CDCl 3 ): 8.32 (br, 3H), 7.35-7.24 (m, 5H), 7.16 (t, 1H), 5.57 (d, 1H), 4.56 (d, 1H), 4.22 (d, 1H), 4.20-4.05 (m, 2H), 3.85 (m, 1H), 3.78 (d, 2H), 3.85 (m, 1H), 3.62 (m, 1H), 3.20-2.90 (m, 3H), 2.32 (m, 1H), 2.25-1.40 (m, 10H), 1.46 (s, 3H), 1.40 (s, 3H), 1.30 (t, 3H), 1.20-0.90 (m, 2H) IR: 3348, 2935, 2874, 1697, 1637, 1541, 1448, 1298, 1242, 1055 Example 16: Trans-4-amino-[(S)-N-[(S)-2-propoxycarbonylamino-3-propylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 32 in Table 1) hydrochloride NMR (CDCl 3 ): 8.33 (br, 3H), 7.19 (t, 1H), 5.57 (d, 1H), 4.57 (d, 1H), 4.31 (d, 1H), 4.11-3.87 (m, 3H), 3.74 (m, 1H), 3.20-2.90 (m, 3H), 2.60-2.40 (m, 2H), 2.34 (m, 1H), 2.15 (m, 2H), 2.10-1.40 (m, 12H), 1.43 (s, 3H), 1.39 (s, 3H), 0.99 (t, 3H), 0.95 (t, 3H), 1.10-0.90 (m, 2H) IR: 3344, 2964, 2878, 1695, 1639, 1529, 1442, 1296, 1240, 1060 Example 17: Trans-4-amino-[(S)-N-[(S)-2-propoxycarbonylamino-3-cyclopentylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No, 165 in Table 1) hydrochloride NMR (CDCl 3 ): 8.32 (br, 3H), 7.21 (t, 1H), 5.59 (d, 1H), 4.58 (d, 1H), 4.32 (d, 1H), 4.13-3.93 (m, 3H), 3.74 (m, 1H), 3.21-2.90 (m, 4H), 2.34 (m, 1H), 2.25-1.40 (m. 20H), 1.47 (s, 3H), 1.39 (s, 3H), 0.95 (t, 3H), 1.10-0.90 (m, 2H) IR: 3348, 2959, 2870, 1693, 1641, 1529, 1446, 1294, 1240, 1060 Example 18: Trans-4-amino-[(S)-N-[(S)-2-propoxycarbonylamino-3-isobutylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 98 in Table 1) hydrochloride NMR (CDCl 3 ): 8.30 (br, 3H), 7.25 (t, 1H), 5.61 (d, 1H), 4.57 (d, 1H), 4.29 (d, 1H), 4.07-3.90 (m, 3H), 3.74 (m, 1H), 3.20-2.90 (m, 1H), 2.40 (m, 2H), 2.30 (m, 1H), 2.16 (m, 2H), 2.10-1.40 (m, 11H), 1.42 (s, 3H), 1.39 (s, 3H), 0.98 (d, 6H), 0.94 (t, 3H), 1.10-0.90 (m, 2H) IR: 3356, 2934, 2883, 1693, 1637, 1527, 1448, 1298, 1240, 1060 Example 19: Trans-4-amino-[(S)-N-[(S)-2-propoxycarbonylamino-3-butylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 79 in Table 1) hydrochloride NMR (CDCl 3 ): 8.32 (br, 3H), 7.19 (t, 1H), 5.58 (d, 1H), 4.56 (d, 1H), 4.32 (d, 1H), 4.10-3.90 (m, 3H), 3.74 (m, 1H), 3.20-2.90 (m, 3H), 2.65-2.46 (m, 2H), 2.34 (m, 1H), 2.16 (m, 2H), 2.10-1.40 (m, 14H), 1.43 (s, 3H), 1.39 (s, 3H), 0.95 (t, 3H), 0.92 (t, 3H), 1.10-0.90 (m, 2H) IR: 3344, 2934, 2874, 1695, 1641, 1529, 1439, 1296, 1240, 1060 Example 20: Trans-4-amino-[(S)-N-[(S)-2-propoxycarbonylamino-3-cyclohexylmethylthio-3-methylbutanoyl)prolyl]aminomethylcyclohexane (Compound No. 241 in Table 1) hydrochloride NMR (CDCl 3 ): 8.31 (br, 3H), 7.20 (t, 1H), 5.59 (d, 1H), 4.58 (d, 1H), 4.30 (d, 1H), 4.15-3.90 (m, 3H), 3.77 (m, 1H), 3.20-2.90 (m, 3H), 2.47-2.30 (m, 3H), 2.18 (m, 2H), 2.10-1.20 (m, 19H), 1.42 (s, 3H), 1.38 (s, 3H), 0.95 (t, 3H), 1.10-0.90 (m, 2H) IR: 3350, 2926, 2852, 1697, 1639, 1533, 1448, 1302, 1240, 1060 Example 21: Trans-4-amino-[(S)-N-[(S)-2-propoxycarbonylamino-3-cyclobutylthio-3-methylbutanoyllprolyl]aminomethylcyclohexane (Compound No. 126 in Table 1) hydrochloride NMR (CDCl 3 ): 8.30 (br, 3H), 7.19 (t, 1H), 5.58 (d, 1H), 4.57 (d, 1H), 4.29 (d, 1H), 4.14-3.90 (m, 3H), 3.75 (m, 1H), 3.22-2.92 (m, 3H), 2.51-2.32 (m, 3H), 2.25-1.20 (m. 17H), 1.42 (s, 3H), 1.38 (s, 3H), 0.95 (t, 3H), 1.10-0.90 (m, 2H) IR: 3358, 2972, 2874, 1697, 1639, 1535, 1440, 1294, 1240, 1060 Example 22: Trans-4-amino-[(S)-N-[(S)-2-propoxycarbonylamino-3-(1'-ethylpropyl)-thio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 182 in Table 1) hydrochloride NMR (CDCl 3 ): 8.31 (br, 3H), 7.27 (t, 1H), 5.65 (d, 1H), 4.60 (d, 1H), 4.24 (d, 1H), 4.16-3.88 (m, 3H), 3.67 (m, 1H), 3.22-3.00 (m, 2H), 2.95 (m, 1H), 2.54 (m, 1H), 2.35 (m, 1H), 2.17 (m, 2H), 2.10-1.40 (m, 17H), 1.44 (s, 3H), 1.41 (s, 3H), 0.98 (t, 3H), 0.95 (t, 3H), 1.10-0.90 (m, 2H) IR: 3425, 2966, 2878, 1701, 1641, 1537, 1446, 1292, 1240, 1060 Example 23: Trans-4-amino-[(S)-N-[(S)-2-isopropoxycarbonylamino-3-phenylmethylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 216 in Table 1) hydrochloride NMR (CDCl 3 ): 8.33 (br, 3H), 7.32 (m, 5H), 7.21 (br, 1H), 5.52 (br, 1H), 4.80 (m, 1H), 4.58 (d, 1H), 4.21 (d, 1H), 3.80 (m, 3H), 3.61 (m, 1H), 3.22-2.90 (m, 3H), 2.40-2.18 (m, 3H), 2.10-1.76 (m, 4H), 1.47 (s, 3H), 1.41 (s, 3H), 1.62-1.39 (m, 4H), 1.26 (m, 6H), 0.99 (m, 2H) IR: 3349, 2978, 2935, 1692, 1644, 1497, 1453, 1242, 1111 Example 24: Trans-4-amino-[(S)-N-[(S)-2-isopropoxycarbonylamino-3-propylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 33 in Table 1) hydrochloride NMR (CDCl 3 ): 8.32 (br, 3H), 7.20 (br, 1H), 5.50 (d, 1H), 4.83 (m, 1H), 4.57 (d, 1H), 4.32 (d, 1H), 3.92 (m, 1H), 3.77 (m, 1H), 3.11 (m, 2H), 2.98 (m, 1H), 2.50 (m, 2H), 2.37 (m, 1H), 2.20 (m, 2H), 2.07-1.78 (m, 5H), 1.56 (m, 5H), 1.43 (s, 3H), 1.39 (s, 3H), 1.26 (d, 3H), 1.24 (d, 3H), 0.99 (t, 3H), 0.98 (m, 2H) IR: 3345, 2936, 1688, 1640, 1534, 1447, 1242, 1111 Example 25: Trans-4-amino-[(S)-N-[(S)-2-isopropoxycarbonylamino-3-butylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 80 in Table 1) hydrochloride NMR (CDCl 3 ): 8.31 (br, 3H), 7.21 (br, 1H), 5.51 (d, 1H), 4.83 (m, 1H), 4.57 (d, 1H), 4.32 (d, 1H), 3.93 (m, 1H), 3.77 (m, 1H), 3.20-2.90 (m, 3H), 2.53 (m, 2H), 2.38 (m, 1H), 2.17 (m, 2H), 1.99 (m, 5H), 1.83 (m, 2H), 1.51 (m, 5H), 1.43 (s, 3H), 1.38 (s, 3H), 1.26 (d, 3H), 1.24 (d, 3H), 1.04-0.90 (m, 2H), 0.92 (t, 3H) IR: 3346, 2934, 2872, 1686, 1638, 1541, 1439, 1242, 1111 Example 26: Trans-4-amino-[(S)-N-[(S)-2-isopropoxycarbonylamino-3-isobutylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 99 in Table 1) hydrochloride NMR (CDCl 3 ): 8.32 (br, 3H), 7.23 (br, 1H), 5.51 (d, 1H), 4.82 (m, 1H), 4.58 (d, 1H), 4.29 (d, 1H), 3.95 (m, 1H), 3.75 (m, 1H), 3.12 (m, 1H), 2.96 (m, 1H), 2.42 (m, 1H), 2.35 (m, 2H), 2.18 (m, 2H), 1.99 (m, 2H), 1.81 (m, 5H), 1.51 (m, 2H), 1.42 (s, 3H), 1.38 (s, 3H), 1.26 (d, 3H), 1.24 (d, 3H), 1.00 (d, 3H), 0.98 (d, 3H), 0.98 (m, 2H) IR: 3345, 2957, 1688, 1640, 1626, 1449, 1242, 1111 Example 27: Trans-4-amino-[(S)-N-[(S)-2-isopropoxycarbonylamino-3-cyclopentylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 172 in Table 1) hydrochloride NMR (CDCl 3 ): 8.31 (br, 3H), 7.23 (br, 1H), 5.53 (d, 1H), 4.83 (m, 1H), 4.59 (d, 1H), 4.32 (d, 1H), 3.94 (m, 1H), 3.74 (m, 1H), 3.09 (m, 3H), 2.94 (m, 1H), 2.39 (m, 1H), 2.19 (m, 2H), 1.99 (m, 5H), 1.83 (m, 2H), 1.71 (m, 2H), 1.54 (m, 7H), 1.46 (s, 3H), 1.39 (s, 3H), 1.26 (d, 3H), 1.24 (d, 3H), 1.00 (m, 2H) IR: 3349, 2942, 2868, 1692, 1640, 1530, 1447, 1240, 1111 Example 28: Trans-4-amino-[(S)-N-[(S)-2-isobutyloxycarbonylamino-3-cyclopentylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 167 in Table 1) hydrochloride NMR (CDCl 3 ): 8.31 (br, 3H), 7.21 (t, 1H), 5.62 (d, 1H), 4.57 (d, 1H), 4.33 (d, 1H), 4.00-3.85 (m, 2H), 3.85-3.70 (m, 2H), 3.20-2.85 (m, 4H), 2.40-1.40 (m, 20H), 1.47 (s, 3H), 1.43 (s, 3H), 1.10-0.90 (m, 2H), 0.94 (d, 6H) IR: 3356, 2966, 2874, 1701, 1637, 1541, 1458, 1296, 1240, 1059 Example 29: Trans-4-amino-[(S)-N-[(S)-2-isobutyloxycarbonylamino-3-isopropylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 54 in Table 1) hydrochloride NMR (CDCl 3 ): 8.31 (br, 3H), 7.21 (t, 1H), 5.63 (d, 1H), 4.58 (d, 1H), 4.31 (d, 1H), 4.05-3.85 (m, 2H), 3.80-3.70 (m, 2H), 3.20-2.90 (m, 4H), 2.34 (m, 1H), 2.20-1.40 (m, 11H), 1.47 (s, 3H), 1.40 (s, 3H), 1.30 (dd, 6H), 0.93 (d, 6H), 1.10-0.90 (m, 2H) IR: 3346, 2935, 2876, 1699, 1637, 1527, 1448, 1292, 1240, 1053 Example 30: Trans-4-amino-[(S)-N-[(S)-2-propoxycarbonylamino-3-(3'-methylbutylthio)-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 255 in Table 1) hydrochloride NMR (CDCl 3 ): 8.32 (br, 3H), 7.19 (t, 1H), 5.59 (d, 1H), 4.58 (d, 1H), 4.32 (d, 1H), 4.15-3.90 (m, 3H), 3.80 (m, 1H), 3.20-2.90 (m, 3H), 2.65-2.45 (m, 2H), 2.35 (m, 1H), 2.30-1.40 (m, 15H), 1.43 (s, 3H), 1.38 (s, 3H), 0.95 (t, 3H), 0.90 (d, 6H), 1.10-0.90 (m, 2H) IR: 3354, 2934, 2874, 1701, 1637, 1541, 1439, 1298, 1240, 1060 Example 31: Trans-4-amino-[(S)-N-[(S)-2-isobutyloxycarbonylamino-3-propylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 35 in Table 1) hydrochloride NMR (CDCl 3 ): 8.32 (br, 3H), 7.19 (t, 1H), 5.60 (d, 1H), 4.57 (d, 1H), 4.33 (d, 1H), 3.89 (dd, 2H), 3.77 (m, 2H), 3.20-2.90 (m, 3H), 2.62-2.45 (m, 2H), 2.34 (m, 1H), 2.18 (m, 2H), 2.10-1.40 (m, 11H), 1.43 (s, 3H), 1.39 (s, 3H), 0.99 (t, 3H), 0.93 (d, 6H), 1.10-0.90 (m, 2H) IR: 3346, 2962, 2878, 1693, 1637, 1527, 1448, 1294, 1240, 1053 Example 32: Trans-4-amino-[(S)-N-[(S)-2-isobutyloxycarbonylamino-3-isobutylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 101 in Table 1) hydrochloride NMR (CDCl 3 ): 8.31 (br, 3H), 7.19 (t, 1H), 5.60 (d, 1H), 4.58 (d, 1H), 4.31 (d, 1H), 4.00-3.85 (m, 2H), 3.75 (m, 2H), 3.20-2.90 (m, 3H), 2.18 (m, 2H), 2.10-1.40 (m, 10H), 1.42 (s, 3H), 1.39 (s, 3H), 0.98 (dd, 6H), 0.94 (d, 6H), 1.10-0.90 (m, 2H) IR: 3346, 2959, 2870, 1701, 1637, 1533, 1448, 1294, 1242, 1053 Example 33: Trans-4-amino-[(S)-N-[(S)-2-isobutyloxycarbonylamino-3-ethylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 17 in Table 1) hydrochloride NMR (CDCl 3 ): 8.31 (br, 3H), 7.18 (t, 1H), 5.62 (d, 1H), 4.58 (d, 1H), 4.34 (d, 1H), 4.00-3.85 (m, 2H), 3.85-3.70 (m, 2H), 3.20-2.90 (m, 3H), 2.70-2.50 (m, 2H), 2.35 (m, 1H), 2.20-1.40 (m, 11H), 1.43 (s, 3H), 1.39 (s, 3H), 1.22 (t, 3H), 0.94 (d, 6H), 1.10-0.90 (m, 2H) IR: 3346, 2962, 2874, 1697, 1643, 1529, 1446, 1294, 1240, 1055 Example 34: Trans-4-amino-[(S)-N-[(S)-2-isopropoxycarbonylamino-3-ethylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 15 in Table 1) hydrochloride NMR (CDCl 3 ): 8.32 (br, 3H), 7.26 (t, 1H), 5.69 (d, 1H), 4.82 (m, 1H), 4.55 (d, 1H), 4.32 (d, 1H), 3.94 (m, 1H), 3.77 (m, 1H), 3.18-2.85 (m, 3H), 2.65-2.45 (m, 2H), 2.31 (m, 1H), 2.20-1.40 (m, 10H), 1.44 (s, 3H), 1.39 (s, 3H), 1.28-1.17 (m, 9H), 1.10-0.90 (m, 2H) IR: 3406, 2978, 2874, 1687, 1637, 1541, 1448, 1255, 1111, 1039 Example 35: Trans-4-amino-[(S)-N-[(S)-2-butoxycarbonylamino-3-propylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 34 in Table 1) hydrochloride NMR (CDCl 3 ): 8.32 (br, 3H), 7.18 (br, 1H), 5.58 (d, 1H), 4.57 (d, 1H), 4.34 (d, 1H), 4.11 (m, 1H), 3.98 (m, 2H), 3.78 (m, 1H), 3.16-2.94 (m, 3H), 2.50 (m, 2H), 2.36 (m, 1H), 2.18 (m, 2H), 2.00 (m, 4H), 1.84 (m, 2H), 1.58 (m, 7H), 1.48-1.30 (m, 2H), 1.43 (s, 3H), 1.39 (s, 3H), 1.10-0.90 (m, 2H), 0.99 (t, 3H), 0.94 (t, 3H) IR: 3428, 3349, 2961, 2936, 1690, 1640, 1535, 1449, 1242, 1065 Example 36: Trans-4-amino-[(S)-N-[(S)-2-butoxycarbonylamino-3-isopropylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 53 in Table 1) hydrochloride NMR (CDCl 3 ): 8.32 (br, 3H), 7.18 (br, 1H), 5.58 (d, 1H), 4.58 (d, 1H), 4.32 (d, 1H), 4.11 (m, 1H), 3.97 (m, 2H), 3.75 (m, 1H), 3.10-3.00 (m, 2H), 3.00 (m, 2H), 2.38 (m, 1H), 2.16 (m, 2H), 2.08 (m, 4H), 1.84 (m, 4H), 1.61 (m, 2H), 1.56-1.40 (m, 2H), 1.42 (s, 3H), 1.37 (s, 3H), 1.32 (d, 3H), 1.26 (d, 3H), 1.04-0.90 (m, 2H), 0.94 (t, 3H) IR: 3349, 3341, 2959, 2934, 1690, 1638, 1524, 1449, 1242, 1065 Example 37: Trans-4-amino-[(S)-N-[(S)-2-butoxycarbonylamino-3-butylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 81 in Table 1) hydrochloride NMR (CDCl 3 ): 8.30 (br, 3H), 7.18 (br, 1H), 5.58 (d, 1H), 4.55 (d, 1H), 4.33 (d, 1H), 4.08 (m, 1H), 4.04-3.86 (m, 2H), 3.70 (m, 1H), 3.12-2.90 (m, 3H), 2.52 (m, 2H), 2.36 (m, 1H), 2.16 (m, 2H), 1.98 (m, 3H), 1.80 (m, 2H), 1.64-1.30 (m, 9H), 1.43 (s, 3H), 1.38 (s, 3H), 1.04-0.90 (m, 2H), 0.94 (t, 3H), 0.91 (t, 3H) IR: 3345, 2959, 2872, 1692, 1640, 1535, 1449, 1242, 1065 Example 38: Trans-4-amino-[(S)-N-[(S)-2-butoxycarbonylamino-3-isobutylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 100 in Table 1) hydrochloride NMR (CDCl 3 ): 8.31 (br, 3H), 7.19 (br, 1H), 5.58 (d, 1H), 4.57 (d, 1H), 4.32 (d, 1H), 4.10 (m, 1H), 3.96 (m, 2H), 3.78 (m, 1H), 3.09 (m, 2H), 2.99 (m, 1H), 2.41 (m, 1H), 2.35 (m, 2H), 2.20 (m, 2H), 1.99 (m, 3H), 1.89-1.75 (m, 3H), 1.62 (m, 3H), 1.58-1.36 (m, 4H), 1.42 (s, 3H), 1.38 (s, 3H), 1.00-0.90 (m, 2H), 0.99 (d, 6H), 0.94 (t, 3H) IR: 3445, 2959, 1686, 1638, 1541, 1449, 1242, 1065 Example 39: Trans-4-amino-[(S)-N-[(S)-2-pentyloxycarbonylamino-3-isopropylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 56 in Table 1) hydrochloride NMR (CDCl 3 ): 8.34 (br, 3H), 7.20 (br, 1H), 5.60 (d, 1H), 4.60 (d, 1H), 4.31 (d, 1H), 4.09 (m, 2H), 4.03 (m, 1H), 3.80 (m, 1H), 3.28-3.06 (m, 4H), 2.46 (m, 1H), 2.28 (m, 2H), 2.06 (m, 4H), 1.92 (m, 4H), 1.70 (m, 4H), 1.62-1.46 (m, 2H), 1.48 (s, 3H), 1.41 (s, 3H), 1.32 (d, 3H), 1.26 (d, 3H), 1.10-1.00 (m, 2H), 0.92 (t, 3H) IR: 3428, 3347, 2957, 2934, 1690, 1640, 1524, 1449, 1240, 1055 Example 40: Trans-4-amidino-[(S)-N-[(S)-2-propoxycarbonylamino-3-isopropylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 410 in Table 1) hydrochloride a) Trans-4-N-benzyloxycarbonylaminomethyl-cyclohexylnitrile To a solution of trans-4-aminomethylcyclohexanecarboxylic acid (25 g, 159 mmol) and sodium carbonate (20 g, 191 mmol) in water (300 ml), benzyloxycarbonyl chloride (27 ml, 190 mmol) was added at 0°C. After stirring was continued for six hours, the mixture was added with 1N hydrochloric acid to adjust its pH to 2, and the deposited white solid was collected by filtration and washed with water, and then dried. The resulting white solid was dissolved in THF (300 ml), and the solution was added with CDI (21 g, 130 mmol) at 0°C. After stirring was continued for three hours, the reaction mixture was added dropwise to a mixture of concentrated aqueous ammonia (50 ml) and THF (150 ml) at 0°C. After stirring for five hours, the solvent was evaporated, and water (500 ml) was added to the residue. The deposited white solid was collected by filtration and washed with water, and then dried. To a solution of the above-obtainedcompound in 1,2-dichloroethane (500 ml), thionyl chloride (19 ml, 260 mmol) was added, and then the mixture was heated at internal temperature of 70°C. After stirring was continued for five hours, the reaction mixture was poured into iced water, and the mixture was neutralized with 1N aqueous sodium hydroxide. The mixture was extracted with chloroform, and the organic layer was washed twice with water and once with saturated brine, and then dried over sodium sulfate. After the solvent was evaporated, the resulting crude product was recrystallized (hexane/ethyl acetate) to obtain the title compound a) (22.8 g, 53%). mp 90-92°C b) Trans-4-(S)-prolylaminomethyl-cyclohexylnitrile The compound obtained in the above a) was dissolved in ethanol (250 ml), and the solution was subjected to catalytic reduction in the presence of palladium black (1 g) at ambient temperature under atmospheric pressure. After the completion of the reaction, the catalyst was removed by filtration, and then the solvent was evaporated. To a solution of (S)-N-benzyloxycarbonylproline (20.7 g, 83 mmol) in THF (150 ml), CDI (13.5 g, 83 mmol) was added at 0°C. After stirring was continued for three hours, the mixture was added with a solution of the compound obtained by the above-described reduction in THF (200 ml) at 0°C. After the mixture was stirred for 12 hours, the solvent was evaporated, and chloroform (400 ml) was added to the resulting residue. The organic layer was washed three times with water and once with saturated brine, and then dried over sodium sulfate. The solvent was evaporated, and the resulting residue was purified by silica gel column chromatography (chloroform/methanol). The resulting compound was dissolved in ethanol (250 ml), and the solution was subjected to catalytic reduction in the presence of palladium black (1 g) at ambient temperature under atmospheric pressure. After the completion of the reaction, the catalyst was removed by filtration, and the solvent was evaporated to obtain the title compound b) (18.8 g, yield; 95%). NMR (DMSO-d 6 ): 0.88-1.06 (m, 2H), 1.38-1.52 (m, 3H), 1.68-2.03 (m, 7H), 2.20-2.40 (m, 1H), 2.52-2.67 (m, 1H), 2.80-3.20 (m, 4H), 4.03-4.10 (m, 1H), 7.53 (br, 1H), 8.65-8.70 (m, 1H) c) Trans-4-[(S)-N-[(S)-2-propoxycarbonylamino-3-isopropylthio-3-methylbutanoyl]-prolyl]aminomethylcyclohexylnitrile To a solution of the compound obtained in the above b) (1.04 g, 4.4 mmol), (S)-2-propoxycarbonylamino-3-isopropylthio-3-methylbutanoic acid (1.20 g, 4.3 mmol) and triethylamine (1.5 g, 14.8 mmol) in dichloromethane (35 ml), a solution of diethyl phosphorocyanidate (DEPC, 0.85 g, 5.3 mmol) in dichloromethane (5 ml) was added dropwise at 0°C. Temperature of the mixture was raised up to room temperature, and stirring was further continued for 24 hours. The reaction mixture was added with water, and the mixture was extracted twice with dichloromethane, and then the organic layer was dried over sodium sulfate. The solvent was evaporated, and the residue was purified by silica gel column chromatography (chloroform/methanol) to obtain the title compound c) (1.77 g, yield; 83%). NMR (CDCl 3 ): 7.18 (t, 1H), 5.58 (d, 1H), 4.61 (d, 1H), 4.33 (d, 1H), 4.20-3.85 (m, 3H), 3.73 (m, 1H), 3.20-2.90 (m, 3H), 2.45-2.30 (m, 2H), 2.15-1.20 (m, 12H), 1.47 (s, 3H), 1.41 (s, 3H), 1.29 (dd, 6H), 0.95 (t, 3H), 1.10-0.90 (m, 2H) d) Trans-4-amidino-[(S)-N-[(S)-2-propoxycarbonylamino-3-isopropylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane hydrochloride To a solution of the compound obtained in the above c) (0.70 g, 1.42 mmol) in chloroform (2 ml), a saturated solution of hydrogen chloride in ethanol (10 ml) was added at 0°C, and then the mixture was left stand at 0°C for 48 hours. The solvent of the reaction mixture was evaporated, and the resulting residue was dissolved in methanol (15 ml), and then the solution was added with ammonium carbonate (1.0 g, 10.4 mmol) at 0°C. The temperature of the mixture was raised up to room temperature, and stirring was continued for six hours, and then the solvent was evaporated. The resulting residue was purified by silica gel column chromatography (chloroform/methanol) to obtain the title compound d) (0.71 g, yield; 92%). NMR (CDCl 3 ): 8.87 (br, 2H), 8.57 (br, 2H), 7.48 (t, 1H), 6.00 (d, 1H), 4.59 (d, 1H), 4.34 (m, 1H), 4.13 (m, 1H), 4.10-3.90 (m, 2H), 3.85-3.65 (m, 2H), 3.15 (m, 1H), 3.05-2.85 (m, 2H), 2.60 (m, 1H), 2.21 (m, 1H), 2.10-1.40 (m, 11H), 1.48 (s, 3H), 1.38 (s, 3H), 1.28 (dd, 6H), 0.93 (t, 3H), 1.10-0.90 (m, 2H) IR: 3325, 3084, 2930, 2874, 1693, 1637, 1521, 1446, 1240, 1062 In similar manners to those described above, the compounds of Examples 40-76 set out below were obtained. Example 41: Trans-4-amidino-[(S)-N-[(S)-2-ethoxycarbonylamino-3-(1'-ethylpropylthio)-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 514 in Table 1) hydrochloride NMR (CDCl 3 ): 8.83 (br, 2H), 8.72 (br, 2H), 7.52 (t, 1H), 5.98 (d, 1H), 4.61 (d, 1H), 4.30-4.15 (m, 3H), 4.00 (m, 1H), 3.71 (m, 1H), 3.18 (m, 1H), 2.89 (m, 1H), 2.70-2.50 (m, 2H), 2.24 (m, 1H), 2.10-1.40 (m, 17H), 1.45 (s, 3H), 1.37 (s, 3H), 1.28 (t, 3H), 1.10-0.90 (m, 2H), 0.96 (dt, 6H) IR: 3298, 3063, 2964, 2868, 1685, 1647, 1521, 1444, 1240, 1055 Example 42: Trans-4-amidino-[(S)-N-[(S)-2-ethoxycarbonylamino-3-propylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 393 in Table 1) hydrochloride NMR (CDCl 3 ): 8.76 (br, 2H), 8.69 (br, 2H), 7.52 (t, 1H), 6.06 (d, 1H), 4.58 (d, 1H), 4.38 (d, 1H), 4.50-4.05 (m, 2H), 3.94 (m, 1H), 3.81 (m, 1H), 3.13 (m, 1H), 2.94 (m, 1H), 2.65 (m, 1H), 2.65-2.40 (m, 2H), 2.19 (m, 1H), 2.15-1.40 (m, 12H), 1.43 (s, 3H), 1.37 (s, 3H), 1.27 (t, 3H), 0.99 (t, 3H), 1.10-0.90 (m, 2H) IR: 3296, 3074, 2932, 2872, 1693, 1639, 1523, 1444, 1242, 1055 Example 43: Trans-4-amidino-[(S)-N-[(S)-2-ethoxycarbonylamino-3-isobutylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 452 in Table 1) hydrochloride NMR (CDCl 3 ): 8.76 (br, 2H), 8.72 (br, 2H), 7.55 (t, 1H), 6.04 (d, 1H), 4.59 (d, 1H), 4.36 (d, 1H), 4.30-4.05 (m, 2H), 3.96 (m, 1H), 3.77 (m, 1H), 3.06 (m, 1H), 2.96 (m, 1H), 2.62 (m, 1H), 2.50-2.30 (m, 2H), 2.20-1.40 (m, 12H), 1.42 (s, 3H), 1.36 (s, 3H), 1.27 (t, 3H), 0.98 (d, 6H), 1.10-0.90 (m, 2H) IR: 3296, 3086, 2959, 2930, 2870, 1687, 1639, 1527, 1444, 1242, 1055 Example 44: Trans-4-amidino-[(S)-N-[(S)-2-isopropoxycarbonylamino-3-ethylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 378 in Table 1) hydrochloride NMR (CDCl 3 ): 8.78 (br, 2H), 8.61 (br, 2H), 7.59 (t, 1H), 5.83 (d, 1H), 4.82 (m, 1H), 4.57 (d, 1H), 4.39 (d, 1H), 3.93 (m, 1H), 3.90-3.65 (m, 2H), 3.15-2.90 (m, 2H), 2.70-2.45 (m, 4H), 2.30-1.40 (m, 9H), 1.42 (s, 3H), 1.37 (s, 3H), 1.25 (d, 6H), 1.21 (t, 3H), 1.10-0.90 (m, 2H) IR: 3323, 3067, 2930, 2866, 1685, 1639, 1516, 1446, 1242, 1111 Example 45: Trans-4-amidino-[(S)-N-[(S)-2-isopropoxycarbonylamino-3-isopropylthio-3-methylbutanoyl)prolyl)aminomethylcyclohexane (Compound No. 411 in Table 1) hydrochloride NMR (CDCl 3 ): 8.74 (br, 2H), 8.68 (br, 2H), 7.62 (t, 1H), 5.84 (d, 1H), 4.83 (m, 1H), 4.57 (d, 1H), 4.36 (d, 1H), 3.98 (m, 1H), 3.71 (m, 1H), 3.10-2.90 (m, 3H), 2.62 (m, 1H), 2.50-1.40 (m, 11H), 1.46 (s, 3H), 1.37 (s, 3H), 1.28 (dd, 6H), 1.26 (d, 6H), 1.10-0.90 (m, 2H) IR: 3292, 3092, 2932, 2872, 1685, 1637, 1516, 1446, 1253, 1047 Example 46: Trans-4-amidino-[(S)-N-[(S)-2-propoxycarbonylamino-3-ethylthio-3-methylbutanoyl]prolyl]aminocyclohexane (Compound No. 377 in Table 1) hydrochloride NMR (CDCl 3 ): 8.78 (br, 2H), 8.65 (br, 2H), 7.54 (t, 1H), 6.06 (d, 1H), 4.60 (d, 1H), 3.98 (d, 1H), 4.20-3.65 (m, 4H), 3.12 (m, 1H), 2.96 (m, 1H), 2.70-2.50 (m, 4H), 2.30-1.40 (m, 12H), 1.43 (s, 3H), 1.37 (s, 3H), 1.21 (t, 3H), 0.94 (t, 3H), 1.10-0.90 (m, 2H) IR: 3288, 3061, 2924, 2876, 1685, 1641, 1520, 1444, 1240, 1062 Example 47: Trans-4-amidino-[(S)-N-[(S)-2-methoxycarbonylamino-3-ethylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 375 in Table 1) hydrochloride NMR (CDCl 3 ): 8.77 (br, 4H), 7.53 (t, 1H), 6.25 (d, 1H), 4.61 (d, 1H), 4.35 (d, 1H), 3.94 (m, 1H), 3.81 (m, 1H), 3.74 (s, 3H), 3.22 (m, 1H), 2.87 (m, 1H), 2.70-2.40 (m, 3H), 2.20 (m, 1H), 2.10-1.40 (m, 11H), 1.45 (s, 3H), 1.37 (s, 3H), 1.21 (t, 3H), 1.10-0.90 (m, 2H) IR: 3279, 3072, 2932, 2864, 1689, 1639, 1527, 1446, 1242, 1059 Example 48: Trans-4-amidino-[(S)-N-[(S)-2-methoxycarbonylamino-3-isopropylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 419 in Table 1) hydrochloride NMR (CDCl 3 ): 8.84 (br, 2H), 8.77 (br, 2H), 7.49 (t, 1H), 6.17 (d, 1H), 4.62 (d, 1H), 4.35 (d, 1H), 3.99 (m, 1H), 3.75 (s, 3H), 3.70 (m, 1H), 3.24 (m, 1H), 2.96 (m, 1H), 2.87 (m, 1H), 2.53 (m, 1H), 2.23 (m, 1H), 2.10-1.40 (m, 10H), 1.49 (s, 3H), 1.37 (s, 3H), 1.26 (dd, 6H), 1.10-0.90 (m, 2H) IR: 3296, 3072, 2930, 2876, 1689, 1639, 1523, 1446, 1242, 1053 Example 49: Trans-4-amidino-[(S)-N-[(S)-2-methoxycarbonylamino-3-propylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 392 in Table 1) hydrochloride NMR (CDCl 3 ): 8.79 (br, 4H), 7.26 (t, 1H), 6.25 (d, 1H), 4.61 (d, 1H), 4.36 (d, 1H), 4.02 (m, 1H), 3.78 (m, 1H), 3.74 (s, 3H), 3.24 (m, 1H), 2.95 (m, 1H), 2.60 (m, 1H), 2.48 (q, 2H), 2.21 (m, 1H), 2.10-1.40 (m, 12H), 1.44 (s, 3H), 1.37 (s, 3H), 0.99 (t, 3H), 1.10-0.90 (m, 2H) IR: 3314, 3082, 2932, 2872, 1685, 1637, 1524, 1448, 1242, 1055 Example 50: Trans-4-amidino-[(S)-N-[(S)-2-methoxycarbonylamino-3-isobutylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 451 in Table 1) hydrochloride NMR (CDCl 3 ): 8.78 (br, 4H), 7.54 (t, 1H), 6.24 (d, 1H), 4.60 (d, 1H), 4.36 (d, 1H), 3.95 (m, 1H), 3.79 (m, 1H), 3.73 (s, 3H), 3.16 (m, 1H), 2.89 (m, 1H), 2.60 (m, 1H), 2.50-2.30 (m, 2H), 2.22 (m, 1H), 2.10-1.40 (m, 11H), 1.43 (s, 3H), 1.36 (s, 3H), 0.98 (d, 6H), 1.10-0.90 (m, 2H) IR: 3329, 3090, 2934, 2872, 1682, 1637, 1523, 1448, 1242, 1055 Example 51: Trans-4-amidino-[(S)-N-[(S)-2-ethoxycarbonylamino-3-ethylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 376 in Table 1) hydrochloride NMR (CDCl 3 ): 8.81 (br, 2H), 8.72 (br, 2H), 7.58 (t, 1H), 6.05 (d, 1H), 4.61 (d, 1H), 4.38 (d, 1H), 4.23-4.05 (m, 2H), 3.94 (m, 1H), 3.77 (m, 1H), 3.13 (m, 1H), 2.99 (m, 1H), 3.70-3.50 (m, 3H), 2.19 (m, 1H), 2.10-1.40 (m, 10H), 1.44 (s, 3H), 1.37 (s, 3H), 1.28 (t, 3H), 1.22 (t, 3H), 1.10-0.90 (m, 2H) IR: 3323, 3076, 2932, 2870, 1685, 1637, 1521, 1444, 1242, 1059 Example 52: Trans-4-amidino-[(S)-N-[(S)-2-ethoxycarbonylamino-3-cyclopentylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 499 in Table 1) hydrochloride NMR (CDCl 3 ): 8.84 (br, 2H), 8.71 (br, 2H), 7.54 (t, 1H), 6.01 (d, 1H), 4.61 (d, 1H), 4.34 (d, 1H), 4.25-4.10 (m, 2H), 3.96 (m, 1H), 3.74 (m, 1H), 3.25-3.00 (m, 2H), 2.91 (m, 1H), 2.59 (m, 1H), 2.21 (m, 1H), 2.20-1.40 (m, 18H), 1.47 (s, 3H), 1.37 (s, 3H), 1.28 (t, 3H), 1.10-0.90 (m, 2H) IR: 3312, 3070, 2937, 2868, 1689, 1637, 1521, 1446, 1242, 1055 Example 53: Trans-4-amidino-[(S)-N-[(S)-2-ethoxycarbonylamino-3-phenylmethylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 529 in Table 1) hydrochloride NMR (CDCl 3 ): 8.83 (br, 2H), 8.69 (br, 2H), 7.49 (t, 1H), 7.38-7.20 (m, 5H), 5.97 (d, 1H), 4.60 (d, 1H), 4.21 (d, 1H), 4.20-4.15 (m, 2H), 3.83 (m, 1H), 3.78 (s, 2H), 3.62 (m, 1H), 3.11 (m, 1H), 2.88 (m, 1H), 2.54 (m, 1H), 2.18 (m, 1H), 2.15-1.40 (m, 10H), 1.47 (s, 3H), 1.37 (s, 3H), 1.28 (t, 3H), 1.10-0.90 (m, 2H) IR: 3315, 3062, 2932, 2866, 1685, 1639, 1518, 1446, 1240, 1055 Example 54: Trans-4-amidino-[(S)-N-[(S)-2-propoxycarbonylamino-3-cyclopentylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 500 in Table 1) hydrochloride NMR (CDCl 3 ): 8.79 (br, 2H), 8.70 (br, 2H), 7.55 (t, 1H), 6.03 (d, 1H), 4.60 (d, 1H), 4.36 (d, 1H), 4.20-3.92 (m, 3H), 3.75 (m, 1H), 3.20-2.80 (m, 3H), 2.62 (m, 1H), 2.20 (m, 1H), 2.10-1.40 (m, 20H), 1.46 (s, 3H), 1.38 (s, 3H), 0.94 (t, 3H), 1.10-0.90 (m, 2H) IR: 3283, 3080, 2935, 2870, 1685, 1647, 1521, 1446, 1238, 1060 Example 55: Trans-4-amidino-[(S)-N-[(S)-2-propoxycarbonylamino-3-propylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 394 in Table 1) hydrochloride NMR (CDCl 3 ): 8.78 (br, 2H), 8.69 (br, 2H), 7.57 (t, 1H), 6.05 (d, 1H), 4.59 (d, 1H), 4.36 (d, 1H), 4.09 (m, 1H), 4.05-3.90 (m, 2H), 3.79 (m, 1H), 3.11 (m, 1H), 2.92 (m, 1H), 2.62 (m, 1H), 2.60-2.45 (m, 2H), 2.19 (m, 1H), 2.10-1.40 (m, 14H), 1.43 (s, 3H), 1.37 (s, 3H), 0.99 (t, 3H), 0.94 (t, 3H), 1.10-0.90 (m, 2H) IR: 3314, 3084, 2937, 2874, 1689, 1637, 1523, 1444, 1238, 1062 Example 56: Trans-4-amidino-[(S)-N-[(S)-2-propoxycarbonylamino-3-isobutylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 453 in Table 1) hydrochloride NMR (CDCl 3 ): 8.74 (br, 4H), 7.58 (t, 1H), 6.06 (d, 1H), 4.58 (d, 1H), 4.38 (d, 1H), 4.18-3.90 (m, 3H), 3.78 (m, 1H), 3.08 (m, 1H), 2.97 (m, 1H), 2.63 (m, 1H), 2.50-2.30 (m, 2H), 2.20-1.40 (m, 14H), 1.42 (s, 3H), 1.37 (s, 3H), 0.98 (d, 6H), 0.94 (t, 3H), 1.10-0.90 (m, 2H) IR: 3335, 3086, 2926, 2874, 1685, 1637, 1521, 1448, 1242, 1062 Example 57: Trans-4-amidino-[(S)-N-[(S)-2-propoxycarbonylamino-3-butylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 435 in Table 1) hydrochloride NMR (CDCl 3 ): 8.78 (br, 2H), 8.68 (br, 2H), 7.53 (t, 1H), 6.05 (d, 1H), 4.59 (d, 1H), 4.36 (d, 1H), 4.08 (m, 1H), 4.05-3.90 (m, 2H), 3.77 (m, 1H), 3.13 (m, 1H), 2.92 (m, 1H), 2.57 (m, 1H), 2.50-2.45 (m, 2H), 2.20 (m, 1H), 2.10-1.40 (m, 16H), 1.43 (s, 3H), 1.37 (s, 3H), 0.94 (t, 3H), 0.91 (t, 3H), 1.10-0.90 (m, 2H) IR: 3269, 3067, 2932, 2863, 1685, 1635, 1521, 1446, 1238, 1062 Example 58: Trans-4-amidino-[(S)-N-[(S)-2-propoxycarbonylamino-3-cyclohexylmethylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 554 in Table 1) hydrochloride NMR (CDCl 3 ): 8.83 (br, 2H), 8.65 (br, 2H), 7.49 (t, 1H), 6.01 (d, 1H), 4.58 (d, 1H), 4.34 (d, 1H), 4.20-3.95 (m, 3H), 3.78 (m, 1H), 3.13 (m, 1H), 2.92 (m, 1H), 2.61 (m, 1H), 2.50-2.30 (m, 2H), 2.29 (m, 1H), 2.02 (m, 2H), 1.95-1.10 (m, 21H), 1.42 (s, 3H), 1.36 (s, 3H), 0.95 (t, 3H), 1.10-0.90 (m, 2H) IR: 3346, 3088, 2926, 2852, 1693, 1655, 1543, 1523, 1448, 1238, 1062 Example 59: Trans-4-amidino-[(S)-N-[(S)-2-propoxycarbonylamino-3-cyclobutylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 469 in Table 1) hydrochloride NMR (CDCl 3 ): 8.78 (br, 2H), 8.71 (br, 2H), 7.56 (t, 1H), 6.03 (d, 1H), 4.60 (d, 1H), 4.33 (d, 1H), 4.20-3.90 (m, 3H), 3.77 (m, 1H), 3.55 (m, 1H), 3.12 (m, 1H), 2.94 (m, 1H), 2.62 (m, 1H), 2.40-2.25 (m, 2H), 2.20-1.40 (m, 17H), 1.40 (s, 3H), 1.33 (s, 3H), 0.94 (t, 3H), 1.10-0.90 (m, 2H) IR: 3296, 3072, 2932, 2874, 1685, 1639, 1521, 1444, 1240, 1060 Example 60: Trans-4-amidino-[(S)-N-[(S)-2-propoxycarbonylamino-3-(1'-ethylpropylthio)-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 515 in Table 1) hydrochloride NMR (CDCl 3 ): 8.81 (br, 2H), 8.75 (br, 2H), 7.52 (t, 1H), 5.99 (d, 1H), 4.60 (d, 1H), 4.27 (d, 1H), 4.20-3.95 (m, 3H), 3.70 (m, 1H), 3.13 (m, 1H), 2.90 (m, 1H), 2.70-2.45 (m, 2H), 2.21 (m, 2H), 2.10-1.40 (m, 19H), 1.45 (s, 3H), 1.37 (s, 3H), 1.10-0.90 (m, 8H) IR: 3329, 3067, 2934, 2878, 1685, 1637, 1521, 1448, 1238, 1060 Example 61: Trans-4-amidino-[(S)-N-[(S)-2-isobutyloxycarbonylamino-3-cyclopentylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 503 in Table 1) hydrochloride NMR (CDCl 3 ): 8.82 (br, 2H), 8.64 (br, 2H), 7.54 (t, 1H), 6.03 (d, 1H), 4.59 (d, 1H), 4.37 (d, 1H), 4.05-3.90 (m, 2H), 3.90-3.70 (m, 2H), 3.15-3.05 (m, 2H), 2.92 (m, 1H), 2.62 (m, 1H), 2.23 (m, 1H), 2.10-1.40 (m, 19H), 1.47 (s, 3H), 1.38 (s, 3H), 0.94 (d, 6H), 1.10-0.90 (m, 2H) IR: 3279, 3082, 2961, 2872, 1685, 1643, 1518, 1446, 1238, 1053 Example 62: Trans-4-amidino-[(S)-N-[(S)-2-isobutyloxycarbonylamino-3-isopropylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 413 in Table 1) hydrochloride NMR (CDCl 3 ): 8.78 (br, 2H), 8.69 (br, 2H), 7.56 (t, 1H), 6.06 (d, 1H), 4.59 (d, 1H), 4.38 (d, 1H), 4.05-3.90 (m, 2H), 3.90-3.85 (m, 2H), 3.09 (m, 1H), 3.08-2.85 (m, 2H), 2.62 (m, 1H), 2.17 (m, 1H), 2.10-1.40 (m, 11H), 1.48 (s, 3H), 1.38 (s, 3H), 1.29 (dd, 6H), 0.93 (d, 6H), 1.10-0.90 (m, 2H) IR: 3271, 3069, 2934, 2876, 1685, 1641, 1518, 1448, 1238, 1053 Example 63: Trans-4-amidino-[(S)-N-[(S)-2-propoxycarbonylamino-3-(3'-methylbutylthio)-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 572 in Table 1) hydrochloride NMR (CDCl 3 ): 8.80 (br, 2H), 8.67 (br, 2H), 7.49 (t, 1H), 6.04 (d, 1H), 4.59 (d, 1H), 4.36 (d, 1H), 4.20-3.95 (m, 3H), 3.73 (m, 1H), 3.15 (m, 1H), 2.93 (m, 1H), 2.70-2.45 (m, 3H), 2.20 (m, 1H), 2.10-1.40 (m, 15H), 1.44 (s, 3H), 1.37 (s, 3H), 0.94 (t, 3H), 0.90 (d, 6H), 1.10-0.90 (m, 2H) IR: 3314, 3074, 2930, 2872, 1685, 1637, 1523, 1240, 1062 Example 64: Trans-4-amidino-[(S)-N-[(S)-2-isobutyloxycarbonylamino-3-propylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 397 in Table 1) hydrochloride NMR (CDCl 3 ): 8.77 (br, 2H), 8.68 (br, 2H), 7.56 (t, 1H), 6.07 (d, 1H), 4.58 (d, 1H), 4.39 (d, 1H), 4.05-3.90 (m, 2H), 3.90-3.70 (m, 2H), 3.10 (m, 1H), 2.95 (m, 1H), 2.65 (m, 1H), 2.60-2.40 (m, 2H), 2.18 (m, 1H), 2.10-1.40 (m, 13H), 1.43 (s, 3H), 1.37 (s, 3H), 0.99 (t, 3H), 0.94 (d, 6H), 1.10-0.90 (m, 2H) IR: 3314, 3069, 2935, 2874, 1685, 1637, 1521, 1448, 1240, 1053 Example 65: Trans-4-amidino-[(S)-N-[(S)-2-isobutyloxycarbonylamino-3-isobutylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 456 in Table 1) hydrochloride NMR (CDCl 3 ): 8.76 (br, 2H), 8.69 (br, 2H), 7.56 (t, 1H), 6.06 (d, 1H), 4.59 (d, 1H), 4.37 (d, 1H), 4.05-3.90 (m, 2H), 3.90-3.70 (m, 2H), 3.08 (m, 1H), 2.96 (m, 1H), 2.62 (m, 1H), 2.50-2.30 (m, 2H), 2.17 (m, 1H), 2.10-1.40 (m, 12H), 1.42 (s, 3H), 1.37 (s, 3H), 0.99 (d, 6H), 0.94 (d, 6H), 1.10-0.90 (m, 2H) IR: 3306, 3067, 2961, 2874, 1685, 1645, 1518, 1321, 1240, 1053 Example 66: Trans-4-amidino-[(S)-N-[(S)-2-isobutyloxycarbonylamino-3-ethylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 380 in Table 1) hydrochloride NMR (CDCl 3 ): 8.74 (br, 2H), 8.70 (br, 2H), 7.58 (t, 1H), 6.08 (d, 1H), 4.58 (d, 1H), 4.41 (d, 1H), 4.05-3.90 (m, 2H), 3.90-3.70 (m, 2H), 3.07 (m, 1H), 2.97 (m, 1H), 2.75-2.50 (m, 3H), 2.20-1.40 (m, 12H), 1.43 (s, 3H), 1.37 (s, 3H), 1.21 (t, 3H), 0.93 (d, 6H), 1.10-0.90 (m, 2H) IR: 3279, 3076, 2934, 2874, 1695, 1637, 1521, 1446, 1240, 1055 Example 67: Trans-4-amidino-[(S)-N-[(S)-2-butoxycarbonylamino-3-isobutylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 455 in Table 1) hydrochloride NMR (CDCl 3 ): 8.78 (br, 2H), 8.66 (br, 2H), 7.55 (br, 1H), 5.97 (d, 1H), 4.57 (d, 1H), 4.38 (d, 1H), 4.14 (m, 1H), 3.99 (m, 1H), 3.80 (m, 1H), 3.07 (m, 1H), 2.99 (m, 1H), 2.64 (m, 1H), 2.39 (m, 2H), 2.22 (m, 1H), 2.18-1.74 (m, 8H), 1.62 (m, 4H), 1.50-1.33 (m, 2H), 1.42 (s, 3H), 1.37 (s, 3H), 1.08-0.95 (m, 2H), 0.98 (d, 6H), 0.93 (t, 3H) IR: 3316, 3084, 2959, 2932, 1686, 1638, 1522, 1449, 1242, 1065 Example 68: Trans-4-amidino-[(S)-N-[(S)-2-butoxycarbonylamino-3-butylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 437 in Table 1) hydrochloride NMR (CDCl 3 ): 8.72 (br, 4H), 7.57 (br, 1H), 5.99 (d, 1H), 4.56 (d, 1H), 4.40 (d, 1H), 4.12 (m, 1H), 3.97 (m, 2H), 3.73 (m, 1H), 3.02 (m, 2H), 2.68-2.44 (m, 4H), 2.51 (m, 2H), 2.22 (m, 1H), 2.08-1.70 (m, 8H), 1.64-1.59 (m, 3H), 1.54-1.49 (m, 3H), 1.44-1.34 (m, 2H), 1.41 (s, 3H), 1.37 (s, 3H), 1.10-0.96 (m, 2H), 0.93 (t, 3H), 0.91 (t, 3H) IR: 3299, 3084, 2959, 2932, 1686, 1638, 1520, 1449, 1242, 1065 Example 69: Trans-4-amidino-[(S)-N-[(S)-2-butoxycarbonylamino-3-isopropylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 412 in Table 1) hydrochloride NMR (CDCl 3 ): 8.76 (br, 2H), 8.69 (br, 2H), 7.57 (br, 1H), 5.97 (d, 1H), 4.58 (d, 1H), 4.38 (d, 1H), 4.13 (m, 1H), 3.98 (m, 2H), 3.78 (m, 1H), 3.10-3.00 (m, 2H), 2.99 (m, 1H), 2.64 (m, 1H), 2.35-2.00 (m, 7H), 2.00-1.90 (m, 4H), 1.62 (m, 4H), 1.47 (s, 3H), 1.38 (s, 3H), 1.31 (d, 3H), 1.26 (d, 3H), 1.10-1.00 (m, 2H), 0.93 (t, 3H) IR: 3328, 3079, 2961, 2932, 1686, 1644, 1518, 1449, 1242, 1065 Example 70: Trans-4-amidino-[(S)-N-[(S)-2-butoxycarbonylamino-3-propylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 396 in Table 1) hydrochloride NMR (CDCl 3 ): 8.76 (br, 2H), 8.67 (br, 2H), 7.56 (br, 1H), 5.98 (d, 1H), 4.56 (d, 1H), 4.39 (d, 1H), 4.13 (m, 1H), 3.98 (m, 2H), 3.80 (m, 1H), 3.00 (m, 2H), 2.61 (m, 1H), 2.50 (m, 2H), 2.30-1.78 (m, 10H), 1.55 (m, 5H), 1.42 (s, 3H), 1.41-1.32 (m, 2H), 1.37 (s, 3H), 1.04-0.88 (m, 2H), 0.99 (t, 3H), 0.93 (t, 3H) IR: 3318, 3084, 2963, 2934, 1686, 1642, 1518, 1449, 1242, 1065 Example 71: Trans-4-amidino-[(S)-N-[(S)-2-isopropoxycarbonylamino-3-cyclopentylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 501 in Table 1) hydrochloride NMR (CDCl 3 ): 8.77 (br, 2H), 8.64 (br, 2H), 7.59 (br, 1H), 5.80 (d, 1H), 4.84 (m, 1H), 4.57 (d, 1H), 4.38 (d, 1H), 3.96 (m, 1H), 3.78 (m, 1H), 3.06 (m, 1H), 3.01 (m, 1H), 2.62 (m, 1H), 2.19 (m, 2H), 2.03 (m, 9H), 1.83 (m, 2H), 1.66 (m, 2H), 1.55 (m, 4H), 1.45 (s, 3H), 1.37 (s, 3H), 1.25 (d, 6H), 1.00 (m, 2H) IR: 3329, 3086, 2936, 1686, 1638, 1510, 1149, 1244, 1111 Example 72: Trans-4-amidino-[(S)-N-[(S)-2-isopropoxycarbonylamino-3-isobutylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 454 in Table 1) hydrochloride NMR (CDCl 3 ): 8.78 (br, 2H), 8.63 (br, 2H), 7.59 (br, 1H), 5.80 (d, 1H), 4.84 (m, 1H), 4.57 (d, 1H), 4.37 (d, 1H), 3.95 (m, 1H), 3.79 (m, 1H), 3.02 (m, 2H), 2.62 (m, 1H), 2.40 (m, 2H), 2.26-1.92 (m, 8H), 1.90-1.78 (m, 4H), 1.41 (s, 3H), 1.36 (s, 3H), 1.25 (d, 6H), 1.10-1.00 (m, 2H), 0.98 (d, 6H) IR: 3318, 2961, 2932, 1686, 1642, 1514, 1244, 1111 Example 73: Trans-4-amidino-[(S)-N-[(S)-2-isopropoxycarbonylamino-3-butylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 436 in Table 1) hydrochloride NMR (CDCl 3 ): 8.78 (br, 2H), 8.61 (br, 2H), 7.58 (br, 1H), 5.80 (d, 1H), 4.83 (m, 1H), 4.56 (d, 1H), 4.38 (d, 1H), 3.95 (m, 1H), 3.77 (m, 1H), 3.02 (m, 12H), 2.70-2.44 (m, 3H), 2.24 (m, 1H), 2.16-1.80 (m, 7H), 1.72 (m, 2H), 1.52 (m, 3H), 1.41 (s, 3H), 1.39 (m, 2H), 1.36 (s, 3H), 1.25 (d, 3H), 1.08 (m, 2H), 0.91 (t, 3H) IR: 3314, 2961, 2932, 1684, 1640, 1516, 1447, 1252, 1111 Example 74: Trans-4-amidino-[(S)-N-[(S)-2-isopropoxycarbonylamino-3-propylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 395 in Table 1) hydrochloride NMR (CDCl 3 ): 8.88 (br, 2H), 8.54 (br, 2H), 7.55 (br, 1H), 5.80 (d, 1H), 4.84 (m, 1H), 4.55 (d, 1H), 4.38 (d, 1H), 3.93 (m, 1H), 3.78 (m, 1H), 3.00 (m, 2H), 2.64-2.42 (m, 3H), 2.30-1.86 (m, 9H), 1.55 (m, 4H), 1.41 (s, 3H), 1.37 (s, 3H), 1.26 (d, 3H), 1.24 (d, 3H), 1.00-0.90 (m, 2H), 0.99 (t, 3H) IR: 3329, 2973, 2932, 1686, 1638, 1522, 1449, 1246, 1111 Example 75: Trans-4-amidino-[(S)-N-[(S)-2-isopropoxycarbonylamino-3-phenylmethylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 531 in Table 1) hydrochloride NMR (CDCl 3 ): 8.75 (br, 2H), 8.63 (br, 2H), 7.56 (br, 1H), 7.33-7.22 (m, 5H), 5.81 (d, 1H), 4.82 (m, 1H), 4.56 (d, 1H), 4.31 (d, 1H), 3.82-3.60 (m, 2H), 3.78 (s, 1H), 3.77 (s, 1H), 2.99 (m, 2H), 2.80 (m, 1H), 2.18 (m, 1H), 2.07-1.76 (m, 7H), 1.66 (m, 2H), 1.45 (s, 3H), 1.38 (s, 3H), 1.26 (d, 3H), 1.24 (d, 3H), 0.98 (m, 2H) IR: 3329, 3084, 2980, 2932, 1686, 1647, 1508, 1451, 1242, 1111 Example 76: Trans-4-amidino-[(S)-N-[(S)-2-butoxycarbonylamino-3-phenylmethylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane (Compound No. 532 in Table 1) hydrochloride NMR (CDCl 3 ): 8.76 (br, 2H), 8.65 (br, 2H), 7.53 (br, 1H), 7.33-7.21 (m, 5H), 5.97 (d, 1H), 4.57 (d, 1H), 4.31 (d, 1H), 4.11 (m, 1H), 4.01 (m, 1H), 3.86-3.76 (m, 1H), 3.78 (s, 1H), 3.77 (s, 1H), 3.65 (m, 1H), 3.06 (m, 1H), 2.95 (m, 1H), 2.56 (m, 1H), 2.24-1.76 (m, 10H), 1.62 (m, 3H), 1.46 (s, 3H), 1.42-1.35 (m, 2H), 1.39 (s, 3H), 1.04-0.91 (m, 2H), 0.93 (t, 3H) IR: 3337, 3086, 2961, 2934, 1686, 1638, 1522, 1451, 1242, 713 Test Example 1: Measurement of thrombin activity i) Method for measuring inhibition of hydrolysis of synthesized substrate (S-2238) S-2238 (Kabi) was dissolved in Tris/HCl buffer (pH 8.3) to prepare a solution of S-2238 at a concentration of 80 µM in 0.4 M Tris/HCl. 175 µl of this solution was added with 515 µl of an aqueous solution of the compound of the present invention and the mixture was incubated at 37°C for one minute, and then the mixture was added with 10 µl of a 4.4 unit/ml solution of bovine thrombin (Mochida). Rate of hydrolysis reaction of the substrate was determined by detecting alteration of absorbance at 405 nm at 37°C. A concentration of an inhibitor (the compound of the present invention) which gave the half of the absorbance value of a sample without the inhibitor was determined as I 50 (µM). ii) Method for measuring inhibition of rat plasma coagulation The compound of the present invention was dissolved in water or physiological saline in a total volume of 0.1 ml, and then the solution was added with 0.1 ml of rat plasma and the mixture was incubated at 37°C for 30 seconds. 0.1 ml of 8 unit/ml solution of bovine thrombin (Mochida) was added to the reaction mixture, and coagulation time was measured at 37°C. A concentration of an inhibitor (the compound of the present invention) which doubled the coagulation time of a sample without the inhibitor was determined as I 50 (µM). iii) Method for measuring antithrombotic activity in rat plasma after oral administration 30 mg/kg of the compound of the present invention was orally administered as an aqueous solution or a suspension to rats starved overnight using an oral tube. After one hour and three hours, 2 ml of blood was collected from abdominal large vein, and antithrombotic activity in plasma was measured by the method described in the above ii). The values were compared with the result obtained by using blood of a rat not administered with the inhibitor (the compound of the present invention), and prolonging effects on coagulation time were indicated as relative values representing rates of prolongation of thrombin time based on a control as being 1. Test Example 2: Measurement of antitrypsin activity i) Method for measuring inhibition of hydrolysis of synthesized substrate (S-2222) S-2222 (Kabi) was dissolved in Tris/HCl buffer (pH 8.3) to prepare a solution of S-2222 at a concentration of 400 µM in 0.4 M Tris/HCl. 175 µl of this solution was added with 515 µl of an aqueous solution of the compound of the present invention and the mixture was incubated at 37°C for one minute. The reaction mixture was then added with 10 µl of 1 or 2 mg/ml solution of bovine trypsin (Sigma). Rate of hydrolysis reaction of the substrate was determined by detecting alteration of absorbance at 405 nm at 37°C. A concentration of an inhibitor (the compound of the present invention) which gave the half of the absorbance value of a sample without the inhibitor was determined as I 50 (µM). The results obtained by the aforementioned Test Examples 1 and 2 are shown in Table 2 below. Antithrombin activity I 50 (µM) Antitrypsin activity Thrombin time prolongation ratio upon oral administration Example No. Synthesized substrate method Rat plasma method I 50 (µM) 1 hour 3 hours 1 0.045 0.044 41 2.16 10.36 2 0.051 0.057 48 1.46 10.31 3 0.091 0.068 38 3.19 2.80 4 0.070 0.048 52 1.84 3.72 5 0.14 0.11 33 6 0.080 0.082 32 7 0.13 27 8 0.024 7.5 9 0.29 68 10 0.10 32 2.89 11 0.097 31 1.67 12 0.081 37 5.98 13 0.076 23 6.13 14 0.079 22 2.79 15 0.36 126 1.29 16 0.069 21 5.92 17 0.089 29 4.02 18 0.11 33 4.09 19 0.14 38 3.91 20 0.57 71 1.36 21 0.11 22 5.46 22 0.068 15 4.13 23 0.48 134 1.36 24 0.095 27 6.07 25 0.14 41 3.26 26 0.12 35 3.10 27 0.086 34 2.32 28 0.081 25 2.19 29 0.070 31 3.40 30 0.22 62 2.56 31 0.078 24 5.21 32 0.10 28 2.92 33 0.093 30 4.77 34 0.074 0.068 29 2.35 7.22 35 0.11 31 3.76 36 0.074 30 4.11 37 0.16 34 3.21 38 0.10 24 4.41 39 0.084 32 4.90 40 0.054 6.4 41 0.073 6.6 42 6.8 43 0.092 7.4 44 0.076 12 45 0.072 46 0.072 47 0.14 6.8 48 0.11 8.5 49 0.14 4.2 50 0.13 6.6 Industrial Applicability The penicillaminamide derivatives of the present invention and salts thereof have potent inhibitory activity against thrombin and excellent oral absorbability. Therefore, they are useful as orally available antithrombotic agents, i.e., anticoagulants.

Claims: A compound represented by the following general formula (I) or a salt thereof, or a hydrate thereof and a solvate thereof: wherein: n represents 1 or 2; R 1 represents a C 1 -C 10 alkyl group which may be substituted with a C 3 -C 10 cycloalkyl group or carboxyl group, a C 6 -C 10 aryl group, a C 3 -C 10 cycloalkyl group, or a C 7 -C 12 aralkyl group; R 2 represents hydrogen atom, a C 1 -C 10 alkyl group, a C 7 -C 12 aralkyl group, -COR 4 (wherein R 4 represents hydrogen atom, a C 1 -C 10 alkyl group, a C 1 -C 10 alkoxy group, a C 6 -C 10 aryl group, a C 6 -C 10 aryloxy group, a C 3 -C 10 cycloalkyl group, a C 3 -C 10 cycloalkyloxy group, a C 7 -C 12 aralkyl group, or a C 7 -C 12 aralkyloxy group), or -SO 2 R 5 (wherein R 5 represents a C 1 -C 10 alkyl group, a C 6 -C 10 aryl group, a C 3 -C 10 cycloalkyl group, or a C 7 -C 12 aralkyl group), and in the above definitions of R 1 to R 5 the C 6 -C 10 aryl group, the C 3 -C 10 cycloalkyl group, the C 7 -C 12 aralkyl group, the C 6 -C 10 aryloxy group, the C 3 -C 10 cycloalkyloxy group, the C 7 -C 12 aralkyloxy group may be substituted with a functional group selected from the group consisting of a C 1 -C 6 alkyl group, a C 1 -C 6 haloalkyl group, a C 1 -C 6 alkoxy group, hydroxyl group, carboxyl group, a C 2 -C 7 carboxyalkyl group, a C 2 -C 7 carboxyalkyloxy group, a C 2 -C 7 acyl group, a C 2 -C 7 acyloxy group, a C 2 -C 7 alkoxycarbonyl group, a C 2 -C 7 alkoxycarbonyloxy group, a C 8 -C 10 aralkyloxycarbonyl group, a C 7 -C 9 alkoxycarbonylalkoxy group, and a halogen atom. R 3 represents amino group or amidino group, provided that the following compounds are excluded: the compound wherein R 1 represents methyl group, R 2 represents ethoxycarbonyl group, R 3 represents amino group, and n represents 1; the compound wherein R 1 represents methyl group, R 2 represents methylsulfonyl group, R 3 represents amino group, and n represents 1; the compound wherein R 1 represents ethyl group, R 2 represents methylsulfonyl group, R 3 represents amino group, and n represents 1; the compound wherein R 1 represents isopropyl group, R 2 represents ethoxycarbonyl group, R 3 represents amidino group, and n represents 1 The compound or the salt thereof, or the hydrate thereof or the solvate thereof according to claim 1, wherein R 1 represents a C 4 -C 10 alkyl group, a C 6 -C 10 aryl group, a C 3 -C 10 cycloalkyl group, or a C 7 -C 12 aralkyl group wherein the C 4 -C 10 alkyl group, the C 6 -C 10 aryl group, the C 3 -C 10 cycloalkyl group, the C 7 -C 12 aralkyl group may be substituted with a functional group selected from the group consisting of a C 1 -C 6 alkyl group, a C 1 -C 6 haloalkyl group, a C 1 -C 6 alkoxy group, hydroxyl group, carboxyl group, a C 2 -C 7 carboxyalkyl group, a C 2 -C 7 carboxyalkyloxy group, a C 2 -C 7 acyl group, a C 2 -C 7 acyloxy group, a C 2 -C 7 alkoxycarbonyl group, a C 2 -C 7 alkoxycarbonyloxy group, a C 8 -C 10 aralkyloxycarbonyl group, a C 7 -C 9 alkoxycarbonylalkoxy group, and a halogen atom and R 3 represents amidino group . The compound or the salt thereof, or the hydrate thereof or the solvate thereof according to claim 1, wherein R 3 represents amino group. The compound or the salt thereof, or the hydrate thereof or the solvate thereof according to claim 1, wherein R 2 represents hydrogen atom, a C 1 -C 10 alkyl group, a C 7 -C 12 aralkyl group, or -COR 4 wherein the C 1 -C 10 alkyl group and the C 7 -C 12 aralkyl group may be substituted with a functional group selected from the group consisting of a C 1 -C 6 alkyl group, a C 1 -C 6 haloalkyl group, a C 1 -C 6 alkoxy group, hydroxyl group, carboxyl group, a C 2 -C 7 carboxyalkyl group, a C 2 -C 7 carboxyalkyloxy group, a C 2 -C 7 acyl group, a C 2 -C 7 acyloxy group, a C 2 -C 7 alkoxycarbonyl group, a C 2 -C 7 alkoxycarbonyloxy group, a C 8 -C 10 aralkyloxycarbonyl group, a C 7 -C 9 alkoxycarbonylalkoxy group, and a halogen atom and wherein R 4 is the same as that defined above. The compound or the salt thereof, or the hydrate thereof or the solvate thereof according to claim 1, wherein R 2 represents -COR 4 wherein R 4 represents a C 1 -C 10 alkyl group, a C 1 -C 10 alkoxy group, a C 6 -C 10 aryl group, a C 6 -C 10 aryloxy group, a C 3 -C 10 cyloalkyl group, a C 3 -C 10 cycloalkyloxy group, a C 7 -C 12 aralkyl group, or a C 7 -C 12 aralkyloxy group, wherein the C 6 -C 10 aryl group, the C 6 -C 10 aryloxy group, the C 3 -C 10 cycloalkyl group, the C 3 -C 10 cycloalkyloxy group, the C 7 -C 12 aralkyl group, the C 7 -C 12 aralkyloxy group may be substituted with a functional group selected from the group consisting of a C 1 -C 6 alkyl group, a C 1 -C 6 haloalkyl group, a C 1 -C 6 alkoxy group, hydroxyl group, carboxyl group, a C 2 -C 7 carboxyalkyl group, a C 2 -C 7 carboxyalkyloxy group, a C 2 -C 7 acyl group, a C 2 -C 7 acyloxy group, a C 2 -C 7 alkoxycarbonyl group, a C 2 -C 7 alkoxycarbonyloxy group, a C 8 -C 10 aralkyloxycarbonyl group, a C 7 -C 9 alkoxycarbonylalkoxy group, and a halogen atom A compound according to claim 1 which is Trans-4-amino-[(S)-N-[(S)-2-propoxycarbonylamino-3-isopropylthio-3-methyl-butanoyl]prolyl]aminomethylcyclohexane or a salt thereof, or a hydrate thereof or a solvate thereof. A compound according to claim 1 which is Trans-4-amino-[(S)-N-[(S)-2-ethoxycarbonylamino-3-isopropylthio-3-methylbutanoyl]prolyl]aminomethylcyclohexane or a salt thereof, or a hydrate thereof or a solvate thereof. A medicament comprising a substance selected from the group consisting of the compound and the salt thereof and the hydrate thereof and the solvate thereof according to any one of claims 1 to 7. A pharmaceutical composition comprising a substance selected from the group consisting of the compound and the salt thereof, and the hydrate thereof and the solvate thereof according to any one of claims 1 to 7 together with a pharmaceutically acceptable additive. The pharmaceutical composition according to claim 9 used as an anticoagulant. A use of a substance selected from the group consisting of the compound and the salt thereof, and the hydrate thereof and the solvate thereof according to any one of clams 1 to 8 for the manufacture of the pharmaceutical composition according to claim 9 or claim 10. A protease inhibitor comprising a substance selected from the group consisting of the compound and the salt thereof, and the hydrate thereof and the solvate thereof according to any one of claims 1 to 7.

Inventors: INAKOSHI NAOTO, IWASE NORIMICHI, OKITSU MISAO, OSHIMA MASAHIRO, SUGAWARA KOICHI, INAKOSHI, NAOTO, IWASE, NORIMICHI, OKITSU, MISAO, OSHIMA, MASAHIRO, SUGAWARA, KOICHI, INAKOSHI, Naoto Mitsubishi Chemical Corporation, IWASE, Norimichi Mitsubishi Chemical Corporation, OKITSU, Misao Mitsubishi Chemical Corporation, OSHIMA, Masahiro Mitsubishi Chemical Corporation, SUGAWARA, Koichi Mitsubishi Chemical Corporation
Applicants: MITSUBISHI CHEM CORP, MITSUBISHI CHEMICAL CORPORATION
Application year: 1996
Main classification: C07D207
IPC codes: A61K38, C07K5