Patent ID: 8691753

Claim:
A compound of formula (1): wherein: n is 1 or 2, when n is 1, W and X each independently-are O, N or C, when n is 2, W and X are C, R 1 is selected from the group consisting of an iodine atom, phenyl, biphenyl, 3′-chlorobiphenyl, phenoxy, phenoxymethyl, phenylethynyl, pyrimidine, 1-methyl-1H-pyrazole, 5-methyl-1,2,4-oxadiazole, 1,2,3-thiadiazole, 1H-pyrrole, thiazole, thiophene, 3a,7a-dihydrobenzo[d]thiazole, 3-aminophenyl, 3-hydroxyphenyl, 3-nitrophenyl, 3-carboxyphenyl, 3′-chlorophenyl, 3,5-dichlorophenyl, 3-methoxyphenyl, 3-hydroxymethylphenyl, and a thiophene ring substituted in at least one position selected from 2, 3, 4, and 5 with a group selected independently for each position from methyl, phenyl, and 3a,7a-dihydrobenzo[d]thiazole, wherein: m is an integer of 1 to 4, when m is 4, R 2 is an amino group, when m is 3, R 2 is a carboxylic acid group, when m is 2, R 2 is a carboxamide group or a carboxylic acid group, when m is 1, R 2 is a carboxylic acid group, a 4-hydroxyphenyl group, a 1H-imidazole group, a hydroxyl group, an isopropyl group, or a methyl group, R 3 is an amino group; a carboxymethylpiperidine group; a carboxymethyl-3-aminophenyl group; or a residue selected from the group consisting of a glutamate residue of L or D configuration, a homoglutamate residue, an aspartate residue, a glutamine residue, an alanine residue, a lysine residue, a tyrosine residue, a histidine residue, a serine residue, and a leucine residue, optionally wherein a terminal carboxylic group of the residue is a carboxamide group —C(═O)NH 2 , and R 3 is bonded via an amino group, and R 4 is H or a carboxymethyl group —CH 2 COOH, or a diastereoisomer or enantiomer of formula (1).