It is to provide a novel pyrazolone derivative represented by the following general formula (1), which is useful as a pharmaceutical and has a phosphodiesterase inhibitory action:
wherein R
1
,R
2
: C
1-6
alkyl; R
3
,R
4
: H, X, C
1-6
alkoxy; Z:O, S; A:AA, BB,
wherein AA represents
wherein BB represents
wherein R
5
: H, C
1-6
alkyl; R
6
,R
7
: C
1-6
alkyl.
本发明旨在提供一种新的
吡唑酮衍
生物,其由以下通式(1)表示,可用作药物并具有
磷酸二酯酶抑制作用:其中R1,R2:C1-6烷基;R3,R4:H,X,C1-6烷氧基;Z:O,S;A:
AA,BB,其中
AA表示其中BB表示其中R5:H,C1-6烷基;R6,R7:C1-6烷基。