Patent ID: 7884204

Claim:
A phenylalanine compound of formula (1) or a pharmaceutically acceptable salt thereof: wherein A represents the following formula (2-1): wherein R10 to R14 may be the same or different from one another and each represents a hydrogen atom, an alkyl group which may have a substituent(s), a lower alkyl group substituted with a cycloalkyl group(s) which may contain a hetero atom(s) in the ring thereof, a lower alkyl group substituted with an aryl group(s), a lower alkyl group substituted with a heteroaryl group(s), a lower hydroxyalkyl group, a lower halogenoalkyl group, a cycloalkyl group which may contain a hetero atom(s) in the ring thereof, an alkenyl group which may have a substituent(s), a lower hydroxyalkenyl group, a lower halogenoalkenyl group, an alkynyl group which may have a substituent(s), an aryl group, a heteroaryl group, a lower alkyloxycarbonyl group, a substituted or unsubstituted carbamoyl group, a lower alkanoyl group, an aroyl group, a lower alkylsulfonyl group, a substituted or unsubstituted sulfamoyl group, a halogen atom, a hydroxyl group, a lower alkoxyl group, a lower alkylthio group, a lower alkoxyl group and lower alkylthio group substituted with a cycloalkyl group(s) which may contain a hetero atom(s) in the ring thereof, a lower alkoxyl group and lower alkylthio group substituted with an aryl group(s), a lower alkoxyl group and lower alkylthio group substituted with a heteroaryl group(s), a lower hydroxylalkoxyl group, a lower halogeno alkoxyl group, a lower halogenoalkylthio group, a cycloalkyloxy group which may contain a hetero atom(s) in the ring thereof, an aryloxy group, a heteroaryloxy group, a nitro group, a cyano group, a substituted or unsubstituted amino group, carboxyl group or a trialkylammonium group, B represents a hydroxyl group, an alkoxyl group, a substituted lower alkoxyl group or a hydroxylamino group, C represents a substituent selected from the group consisting of a substituted aryl group, an unsubstituted aryl group, a substituted cycloalkyl group and an unsubstituted cycloalkyl group and J and J′ may be the same or different from one another and each represents a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkyloxy group, a nitro group, an amino group or a hydroxyl group.