Patent ID: 7456218

Claim:
A compound represented by the formula (I): wherein R 1 , R 3 , R 4 and R 5 are the same or different and each is a hydrogen atom, a halogen atom, optionally substituted C 1-6 alkyl group, optionally substituted C 2-6 alkenyl group, optionally substituted C 2-6 alkynyl group, optionally substituted C 3-8 cycloalkyl group, optionally substituted C 6-14 aryl group, optionally substituted C 7-16 aralkyl group or an optionally substituted hydroxy group; R 2 is a halogen atom, a nitro group, optionally substituted C 1-6 alkyl group, optionally substituted C 2-6 alkenyl group, optionally substituted C 2-6 alkynyl group, optionally substituted C 3-8 cycloalkyl group, optionally substituted C 6-14 aryl group, optionally substituted C 7-16 aralkyl group, an optionally substituted hydroxy group, an optionally substituted amino group, an optionally substituted mercapto group, an optionally substituted acyl group or an optionally substituted heterocyclic group; R 10 and R 11 are the same or different and each is a hydrogen atom, a halogen atom or a C 1-6 alkoxy group; E is a bond, an optionally substituted C 1-4 alkylene group, —W 1 —O—W 2 —, —W 1 —S—W 2 — or —W 1 —N(R 6 )—W 2 — (wherein W 1 and W 2 are the same or different and each is a bond or an optionally substituted C 1-3 alkylene group, and R 6 is a hydrogen atom, an optionally substituted acyl group, optionally substituted C 1-6 alkyl group, optionally substituted C 2-6 alkenyl group, optionally substituted C 2-6 alkynyl group, optionally substituted C 3-8 cycloalkyl group, optionally substituted C 6-14 aryl group or optionally substituted C 7-16 aralkyl group); ring S 1 is a benzene ring optionally further having substituent(s) selected from a halogen atom, optionally substituted C 1-6 alkyl group, optionally substituted C 2-6 alkenyl group, optionally substituted C 2-6 alkynyl group, optionally substituted C 3-8 cycloalkyl group, optionally substituted C 6-14 aryl group, optionally substituted C 7-16 aralkyl group, an optionally substituted hydroxy group and an optionally substituted amino group; and R is an optionally substituted hydroxy group or an optionally substituted amino group; provided that R 1 and R 3 are not simultaneously a hydrogen atom, or a salt thereof.