PYRIDAZINONE DERIVATIVE AND PDE INHIBITOR CONTAINING THE SAME AS ACTIVE INGREDIENT
申请人:Kyorin Pharmaceutical Co., Ltd.
公开号:EP2168959A1
公开(公告)日:2010-03-31
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 R1 represents H or C1-6 alkyl, each of R2 and R3 represents H, X, C1-6 alkoxy, Z represents O or S, and A represents AA or BB, wherein AA represents:
and BB represents:
wherein R4 represents H or C1-6 alkyl, and each of R5 and R6 represents C1-6 alkyl.