Patent ID: 7132547

Claim:
A compound represented by the formula: wherein Ar 1 represents wherein A ring represents a benzene ring which may have 1 to 4 substituents selected from (i) halogen, (ii) C 1-6 alkoxy, (iii) halogenoC 1-6 alkoxy, (iv) amino, (v) (mono or di) C 1-6 alkylamino, (vi) hexamethyleneimino, (vii) C 1-6 alkyl which may be substituted with carboxy optionally esterified with C 1-6 alkyl, (viii) lower alkyl-carbonylamino, (ix) lower alkylsulfonylamino, (x) aminosulfonyl, (xi) (mono or di) C 1-6 alkylaminosulfonyl, (xii) carbamoyl, (xiii) (mono or di) C 1-6 alkylcarbamoyl, and (xiv) cyano, R 1 and R 1′ each individually represent (1) hydrogen atom, (2) C 1-6 alkyl group or C 7-16 aralkyl group, each of which may have 1 or 2 substituents selected from hydroxy and C 1-6 alkoxy-carbonyl, or (3) a group represented by the formula: —(C═O)—R 2′ , —(C═O)—NR 2′ R 3′ or —SO 2 R 2′ wherein R 2′ and R 3′ represent hydrogen atom, optionally halogenated C 1-6 alkyl or C 6-10 aryl, respectively; L 1 represents a C 4-6 alkylene group which may have 1 to 4 substituents selected from halogen atom, nitro, cyano, optionally halogenated C 1-6 alkoxy and hydroxy; L 2 represents a C 2-4 alkylene group which may have 1 to 4 substituents selected from halogen atom, hydroxy, oxo and phenyl; R represents (i) hydrogen atom, (ii) C 1-4 alkyl group which may have 1 to 3 substituents selected from halogen atom and hydroxy or (iii) C 7-16 aralkyl group; X represents a bond, an oxygen atom or NH; and Ar 2 represents a C 6-10 aryl group which may have 1 to 5 substituents selected from halogen atom, C 1-6 alkyl group, halogenoC 1-6 alkyl, hydroxy, C 1-6 alkoxy, halogenoC 1-6 alkoxy, nitro, amino, cyano, carbamoyl, amino which may be substituted with carbamoyl or formyl, each of which is optionally substituted with C 1-6 alkyl, C 1-3 alkylenedioxy, aminocarbonyloxy group which may be substituted with C 1-6 alkyl, aminosulfonyl, mono-C 1-6 alkylaminosulfonyl and di-C 1-6 alkylaminosulfonyl, or a salt thereof.