Compounds of formula (I), wherein R
1
is as defined in the claims, exhibit COMT enzyme inhibiting activity and are thus useful as COMT inhibitors. Methods of treatment and pharmaceutical dosage forms are also disclosed.
式(I)的化合物,其中R1如权利要求所定义,表现出CO
MT酶抑制活性,因此可用作CO
MT抑制剂。还公开了治疗方法和制药剂量形式。