Patent ID: 7064124

Claim:
A substituted benzoic acid derivative represented by the following formula (I): wherein R 1 is the following formula (II): or the following formula (III): wherein R 3 , R 4 and R 5 each independently represents an alkyl group having from 1 to 6 carbon atoms, or an alkoxy group having from 1 to 6 carbon atoms; R 9 and R 10 each independently represents a hydrogen atom, an alkyl group having from 1 to 6 carbon atoms, or an acyl group having from 2 to 11 carbon atoms; R 2 represents a hydrogen atom, a optionally substituted lower alkyl group having from 1 to 6 carbon atoms, an optionally substituted aryl group having from 6 to 12 carbon atoms, an optionally substituted heteroaryl group having from 4 to 11 carbon atoms, an optionally substituted aralkyl group having from 7 to 14 carbon atoms, an optionally substituted heteroarylalkyl group having from 5 to 13 carbon atoms, or an optionally substituted acyl group having from 2 to 11 carbon atoms; and X represents a carboxyl group which may be esterified or amidated.