申请人:BEECHAM GROUP PLC
公开号:EP0032048A1
公开(公告)日:1981-07-15
Compounds of formula (I):
and pharmaceutically acceptable salts and pro-drugs thereof, wherein:
R1 and R2 are the same or different and are hydrogen, halogen or C1-4 alkyl;
R3 is hydrogen or C1-6 alkyl
R4 is hydrogen or methyl; and
n is 0 or 1 having useful pharmacological activity, processes for their preparation and their use
式(I)化合物:
及其药学上可接受的盐和原药,其中
R1 和 R2 相同或不同,并且是氢、卤素或 C1-4 烷基;
R3 是氢或 C1-6 烷基
R4 是氢或甲基;以及
n 为 0 或 1,具有有用的药理活性、制备工艺和用途