Compounds of formula (I′) wherein the two OH— substituents in the phenyl moiety are in a position ortho to one another and R1 in a position ortho to one of the hydroxy groups; and X, R
1
to R
6
are as defined in claims, exhibit COMT enzyme inhibiting activity so that they are useful as COMT inhibitors.
公式(I')的化合物中,苯基部分的两个OH-取代基在相互正交的位置上,R1在其中一个羟基的正交位置上; X,R1至R6如权利要求所定义的,表现出CO
MT酶抑制活性,因此它们可用作CO
MT抑制剂。