Patent ID: 8088821

Claim:
A compound represented by the formula (I): wherein R 1 is R 6 —SO 2 — (wherein R 6 is a C 1-6 alkyl group); X is a bond or a C 1-6 alkylene group; R 2 and R 3 are the same or different and each is a hydrogen atom, a halogen atom or a C 1-6 alkyl group; R 4 and R 5 are the same or different and each is a C 1-6 alkyl group optionally substituted by hydroxy group(s); ring A is a benzene ring optionally further having 1 to 3 substituents selected from the group consisting of: a halogen atom; a C 1-6 alkyl group optionally substituted by 1 to 3 C 6-14 aryloxy groups; a C 1-6 alkoxy group optionally substituted by 1 to 3 C 6-14 aryl groups; and a C 6-14 aryloxy group; ring B is a 5- to 7-membered monocyclic non-aromatic heterocycle; Y is a bond or CH 2 ; and R is a hydroxy group or a C 1-6 alkoxy group, or a salt thereof.