Patent ID: 7078422

Claim:
A phenylacetic-acid derivative having the following formula (I) or a salt thereof: wherein each of R 1 and R 2 independently is a hydrogen atom, a halogen atom, nitro, an alkyl group having 1–8 carbon atoms, an alkoxy group having 1–8 carbon atoms, an alkyl group having 1–8 carbon atoms which has 1 to 3 halogen substituents, an alkoxy group having 1–8 carbon atoms which has 1 to 3 halogen substituents, an alkenyl group having 2–8 carbon atoms, an alkynyl group having 2–8 carbon atoms, a 3–7 membered cycloalkyl group, an alkyl group having 1–8 carbon atom which has a 3–7 membered cycloalkyl substituent, an aryl group having 6–10 carbon atoms which optionally has a substituent, an arylalkyl group which has a C 6-10 aryl portion and C 1-8 alkyl portion, a heterocyclic group which optionally has a substituent, or a heterocyclic-alkyl group having an alkyl group of 1–8 carbon atoms; A is an oxygen atom, a sulfur atom; each of X and Z independently is —C(═O)—, —C(═O)NH—, —C(═N—OR 4 )—, —CH(OR 5 )—, —NH (C═O)—, —NHSO 2 —, —SO 2 NH—, —CH═CH—, —C═C—, or a bond in which each of R 4 and R 5 is a hydrogen atom or an alkyl group having 1–8 carbon atoms; and Y is an alkylene chain having 1–8 carbon atoms.