Pyridazin-3(2H)-one derivatives

Details Pyridazin-3(2H)-one derivatives Pyridazin-3(2H)-one derivatives

2003-12-22

2009-02-17

Berch, Mark L. (Department: 1624)

Drug, bio-affecting and body treating compositions

Designated organic active ingredient containing

Heterocyclic carbon compounds containing a hetero ring...

C514S252020, C514S252030, C514S252040, C514S252050, C514S252060, C544S238000, C544S239000, C544S236000

Reexamination Certificate

active

07491722

ABSTRACT:
Pyridazin-3(2H)-one derivatives of formula (I) are found to inhibit PDE-4. R1, R2and R4are organic radicals, R3is a cyclic group, and R5is an ester or an aryl or heteroaryl group.

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