Patent ID: 7253178

Claim:
A carboxylic acid compound represented by the formula (I), or a salt thereof: wherein Ar represents a C 6-10 aryl group optionally having at least one substituent; R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 are the same as or different from each other and each represents a hydrogen atom, a hydroxyl group, a halogen atom, a C 1-6 alkyl group or a C 1-6 alkoxy group; X represents an oxygen atom or a methylene group; Y represents a group represented by the formula (II) or (III): wherein Z represents a group represented by the formula (IV): wherein R 9 , R 10 , R 11 and R 12 are the same as or different from each other and each represents a hydrogen atom, a halogen atom, a hydroxyl group, a C 1-6 alkyl group or a C 1-6 alkoxy group; m is 0 or 1; and n is 0 or 1.