Compounds of the formula (I):
and pharmaceutically acceptable salts thereof, wherein
R1 is isopropyl or tertiary-butyl;
R2 is hydrogen, C1-4alkyl, C1-4alkoxy, hydroxy or amino; and
R3 is hydrogen or methyl; are described for use as β-adrenoceptor antagonists. Pharmaceutical compositions containing them are disclosed as are processes for their preparation and intermediates therefor.
式 (I) 的化合物:
及其药学上可接受的盐类,其中
R1 是
异丙基或叔丁基;
R2 是
氢、C1-4烷基、C1-4烷
氧基、羟基或
氨基;以及
R3 为
氢或
甲基;所述物质可用作 β-
肾上腺素受体
拮抗剂。公开了含有它们的药物组合物及其制备工艺和
中间体。