Patent ID: 8735425

Claim:
A compound of formula (II), or a pharmacologically acceptable salt thereof: wherein, R represents a phenyl group optionally substituted with 1 to 5 groups each independently selected from Substituent Group A or a C 3 -C 6 cycloalkyl group; R 3 represents a carboxyl group; X represents an oxygen atom; and Substituent Group A is a group consisting of a halogen atom, a C 1 -C 6 alkyl group, a C 1 -C 6 halogenated alkyl group, a C 1 -C 6 alkoxy group, a C 1 -C 6 halogenated alkoxy group, a (C 1 -C 6 alkoxy)-(C 1 -C 6 alkyl) group, a C 1 -C 6 alkylthio group, a carboxyl group, a C 2 -C 7 alkylcarbonyl group, a C 2 -C 7 alkoxycarbonyl group, an amino group, a mono-C 2 -C 7 alkylcarbonylamino group, a mono-C 1 -C 6 alkylsulfonylamino group, a mono-C 1 -C 6 alkylamino group, a di-(C 1 -C 6 alkyl)amino group, a cyano group, a nitro group, a hydroxy group, and a C 1 -C 6 alkylsulfinyl group.