Pyridazin-3(2H)-one derivatives of formula (I) are found to inhibit PDE-4. R
1
, R
2
and R
4
are organic radicals, R
3
is a cyclic group, and R
5
is an ester or an aryl or heteroaryl group.
公式(I)的
吡啶并嗪-3(2H)-酮衍
生物被发现可以抑制PDE-4。R1,R2和R4是有机基团,R3是一个环状基团,R5是酯基或芳基或杂环基团。