Patent ID: 7960369

Claim:
A compound represented by the formula wherein ring S1 is a benzene ring having a substituent represented by the formula: R 11 -E 2 -, wherein R 11 is a phenyl group, an indanyl group or a naphthyl group, each optionally having substituent(s), and E 2 is a bond or a spacer, and the spacer represented by —(CH 2 ) m 1 —W 1 —(CH 2 ) m 2 — wherein m 1 and m 2 are each an integer of 0 to 3, W 1 is —O—, —N(R2)-, —S—, —CO— or —CO—N(R 3 )—, and R 2 and R 3 are each a hydrogen atom or a C 1-6 alkyl group-), or R 11 forms, together with E 2 and ring S 1 , and ring S 1 optionally has additional substituent(s) in addition to R 11 -E 2 -, said additional substituent(s) selected from the group consisting of an optionally substituted C 1-6 alkyl group, an optionally substituted C 1-6 alkoxy group, a halogen atom and a C 7-16 aralkyloxy group; ring R is a phenylene group optionally having substituent(s) selected from the group consisting of a C 1-6 alkyl group, a halogen atom, a C 1-6 alkoxy group and a hydroxy group; and Ra is a hydrogen atom, a halogen atom, a C 1-6 alkyl group or a C 1-6 alkoxy group or a salt thereof.