Patent ID: 8309580

Claim:
A compound represented by the formula (I): wherein ring A is a benzene ring or a pyridine ring, each of which is optionally further substituted; Y is an oxygen atom, a sulfur atom or a nitrogen atom; X is —O—, —S—, —SO—, —SO 2 —, —CR 4 R 5 —O—, —O—CR 4 R 5 —, —CO—CR 4 R 5 , —CR 4 R 5 —CO— or —CR 4 R 5 —NR 6 ; R 4 is a hydrogen atom or a C 1-6 alkyl group; R 5 is an optionally substituted C 1-6 alkyl group, an optionally substituted C 3-10 cycloalkyl group, an optionally substituted C 6-14 aryl group or an optionally substituted 5- or 6-membered heterocyclic group; R 6 is a hydrogen atom, an optionally substituted C 1-6 alkyl group, an optionally substituted C 3-10 cycloalkyl group, an optionally substituted C 6-14 aryl group or an optionally substituted 5- or 6-membered heterocyclic group; R 1 is an optionally substituted hydrocarbon group, an optionally substituted heterocyclic group, an optionally substituted hydroxy group or an acyl group; R 2 is a hydrogen atom, an optionally substituted hydrocarbon group, an optionally substituted heterocyclic group, an optionally substituted hydroxy group or an acyl group; R 3 is —(CH 2 ) 3 —COOH or —NR 7 —CR 8 R 9 —CR 10 R 11 —COOH; R 7 is a C 1-6 alkyl group; R 8 , R 9 and R 10 are each independently a hydrogen atom or a C 1-6 alkyl group; R 11 is a hydrogen atom, a C 1-6 alkyl group or a hydroxy group, or a salt thereof.