Compounds of the formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3, which may be identical or different from each other, are each hydrogen, fluorine, chlorine, bromine, methyl, ethyl, methoxy, hydroxyl, trifluoromethyl or cyano; and R.sub.4 is (cycloalkyl of 3 to 6 carbon atoms)-methyl; and non-toxic, pharmacologically acceptable acid addition salts thereof. The compounds as well as their salts are useful as analgesics.
公式为##STR1##的化合物,其中R.sub.1、R.sub.2和R.sub.3可以相同也可以不同,分别是氢、
氟、
氯、
溴、甲基、乙基、甲氧基、羟基、三
氟甲基或
氰基;而R.sub.4是(含3至6个碳原子的环烷基)-甲基;以及其非毒性、药理学上可接受的酸加盐。这些化合物及其盐可用作镇痛剂。