It is to provide a novel pyridazinone derivative represented by the following general formula (1), which is useful as a pharmaceutical and has a phosphodiesterase inhibitory action:
wherein R
1
represents H or C
1-6
alkyl, each of R
2
and R
3
represents H, X, C
1-6
alkoxy, Z represents O or S, and A represents AA or BB, wherein AA represents:
and BB represents:
wherein R
4
represents H or C
1-6
alkyl, and each of R
5
and R
6
represents C
1-6
alkyl.
本发明提供了一种新的
吡啶并
咪唑酮衍
生物,其通式(1)如下,可用作药物,并具有
磷酸二酯酶抑制作用:其中,R1代表H或C1-6烷基,R2和R3中的每一个代表H、X、C1-6烷氧基,Z代表O或S,A代表
AA或BB,其中
AA代表:BB代表:其中,R4代表H或C1-6烷基,R5和R6中的每一个代表C1-6烷基。