申请人:Boehringer Ingelheim GmbH
公开号:US04087532A1
公开(公告)日:1978-05-02
Compounds of the formula ##STR1## wherein R.sub.1 is methyl, ethyl or propyl, R.sub.2 is hydrogen, methyl or ethyl, R.sub.3 is hydrogen or methyl, and R.sub.4 is hydrogen, alkyl of 1 to 4 carbon atoms or alkanoyl of 2 to 5 carbon atoms, And non-toxic, pharmacologically acceptable acid addition salts thereof; the compounds as well as the salts are useful as analgesics.
公式为##STR1##的化合物,其中R.sub.1为甲基、乙基或丙基,R.sub.2为氢、甲基或乙基,R.sub.3为氢或甲基,R.sub.4为氢、1至4个碳原子的烷基或2至5个碳原子的酰基,以及其非毒性、药理学上可接受的酸盐;这些化合物及其盐可用作止痛药。