Patent ID: 7541376

Claim:
A compound represented by the following formula, a salt thereof wherein R 1 is a C 6 -C 14 aromatic cyclic hydrocarbon group which may be substituted by one to three groups selected from the following Substituent Group “a”: <Substituent Group “a”> a member selected from the group consisting of (1) (a) C 1 -C 6 alkyl groups, (b) C 1 -C 6 alkoxy groups, (c) C 1 -C 7 acyl groups, (d) an amido group, (e) an amino group and (f) C 3 -C 8 cycloalkyl groups, each of which may be substituted by one to three groups selected from the following Substituent Group “b”, (2) halogen atoms, (3) a hydroxyl group, (4) a nitro group, (5) a cyano group, and (6) a carboxyl group; <Substituent Group “b”> a member selected from the group consisting of C 1 -C 6 alkyl groups, halogen atoms, a hydroxyl group, a nitro group, a cyano group and a carboxyl group; R 2 , R 4 and R 5 each independently represent a hydrogen atom, a halogen atom, a hydroxyl group, a cyano group, a nitro group, a carboxyl group, a C 1 -C 6 alkyl group which may be substituted, a C 1 -C 6 alkoxy group which may be substituted, a C 2 -C 7 acyl group which may be substituted, —CO—NR 2a R 2b , —NR 2b CO—R 2a or —NR 2a R 2b , wherein R 2a and R 2b each independently represent a hydrogen atom or a C 1 -C 6 alkyl group which may be substituted, provided that at least one of R 2 , R 4 and R 5 is not a hydrogen atom; L is a single bond, a C 1 -C 6 alkylene group which may be substituted, a C 2 -C 6 alkenylene group which may be substituted or a C 2 -C 6 alkynylene group which may be substituted; X is —NH—CO—(CH 2 ) t — wherein t is 0 or 1; and Y is a hydrogen atom, a halogen atom, a nitro group, a hydroxyl group, a cyano group, a carboxyl group, a C 1 -C 6 alkyl group which may be substituted, a C 2 -C 6 alkenyl group which may be substituted, a C 2 -C 6 alkynyl group which may be substituted, a C 1 -C 6 alkoxy group which may be substituted, a C 3 -C 8 cycloalkyl group which may be substituted, a C 3 -C 8 cycloalkenyl group which may be substituted, a piperazinyl, pyrrolidinyl, or piperidinyl group which may be substituted, a C 6 -C 14 aromatic cyclic hydrocarbon group which may be substituted, a thienyl or furanyl group which may be substituted, an amino group or —W—R 15 , wherein W is —CO— or —SO 2 —; and R 15 is a C 1 -C 6 alkyl group which may be substituted, a C 6 -C 14 aromatic cyclic hydrocarbon group which may be substituted, a thienyl or furanyl group which may be substituted or an amino group.