A pyridazinone derivative represented by the following general formula
wherein R1 represents a hydrogen atom or a methyl group, either one of R2, R3 and R4 represents a hydrogen atom and the remaining two of them represent a lower alkyl group, a trifluoromethyl group, a halogen atom, a cyano group or a nitro group,
or a salt thereof. The compounds are useful as antihypertensive agents.
由以下通式代表的
哒嗪酮衍
生物 其中 R1 代表氢原子或甲基,R2、R3 和 R4 中的任一个代表氢原子,其余两个代表低级烷基、三
氟甲基、卤素原子、
氰基或硝基,或其盐。 这些化合物可用作抗高血压药。