| 摘要 |
Compounds of the formula <IMAGE> wherein R1, R2 and R3, which may be identical or different from each other, are each hydrogen, fluorine, chlorine, bromine, methyl, ethyl, methoxy, hydroxyl, trifluoromethyl or cyano; and R4 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. |
