The present invention is concerned with novel pyridazinone derivatives of formula (I) wherein R1, R2, R3 and R4 are as defined in the description and in the claims, as well as physiologically acceptable salts and esters thereof. These compounds inhibit PDE10A and can be used as medicaments.
本发明涉及一种新颖的
吡啶并嗪酮衍
生物,其
化学式为(I),其中R1、R2、R3和R4如描述和权利要求中所定义,并且其生理上可接受的盐和酯。这些化合物抑制PDE10A,可用作药物。