Patent ID: 7534887

Claim:
A compound represented by Formula (I): wherein R is naphthyl which may be substituted; X is a bond; X′ is a bond ; Y is a C 1-3 alkylene which may be substituted; Y′ is —C(═O)—; ring A is a piperazine ring which may be substituted; Z 1 and -Z 2 are each a bond; -Z 3 is C 1-3 alkylene which may be substituted; B is a group represented by the formula: (wherein R 1 , R 3 and R 4 are each a hydrogen atom or a C 1-6 alkyl which may be substituted, and R 3 and R 4 may be bonded to each other to form tetrahydroimidazole which may be substituted); and a is 0, 1 or 2, or a salt thereof.