| abstract |
A pyridazinone compound represented by the general formula ##STR1## wherein Ar is ##STR2## in which R 1 , R 2 and R 3 may be identical or different, and each represents a hydrogen atom, a lower alkyl group, a trifluoromethyl group, a halogen atom, a cyano group or a nitro group, and R 4 represents a hydrogen atom, a lower alkoxy group, or a lower alkyl group substituted by a lower alkoxy group or a carbamoyl group, and C* is an assymmetric carbon atom, n or a salt thereof. This compound is useful for the treatment of diseases of the circulatory system. |