Compounds of formula I′
wherein the two —OH substituents in the phenyl moiety are in a position ortho to one another and R
1
in a position ortho to one of the hydroxy groups; and X, R
1
to R
6
are as defined in disclosure. The compounds exhibit COMT enzyme inhibiting activity, so are useful as COMT inhibitors.
式I'的化合物,其中苯基部分的两个-OH取代基相互正交,R1位于其中一个羟基的正交位置; X,R1到R6如披露中定义。这些化合物表现出CO
MT酶抑制活性,因此可用作CO
MT抑制剂。