Patent ID: 6930185

Claim:
A compound of the formula: wherein Ar 1 is a cyclic group which may be substituted; X 1 is CONR 8, NR 8 CO (wherein R 8 is hydrogen atom, optionally halogenated C 1-6 alkyl, optionally halogenated C 1-6 alkyl-carbonyl or optionally halogenated C 1-6 alkylsulfonyl), OCO or COO; Y is —CH 2 —; Ar is a quinoline ring which may be substituted; R 1 and R 2 are the same or different and are hydrogen atom or a hydrocarbon group which may be substituted; or R 1 and R 2, together with the adjacent nitrogen atom, may form a pyrrolidine ring which may be substituted; provided that, when X 1 is CONH, Ar is not 4-methyl-2-quinolone which may have a substituent selected from the group consisting of alkyl, alkoxy and halogen; and, when X 1 is COO, Ar 1 is not an aromatic group which may be substituted; or a salt thereof.