This invention provides new compounds of formula I, ##STR1## wherein R.sub.1 is hydrogen, alkyl or 1 to 4 carbon atoms, fluorine, chlorine or bromine, R.sub.2 is hydrogen, alkyl of 1 to 4 carbon atoms, cycloalkylalkyl of 4 to 10 carbon atoms, alkenyl or alkinyl of 3 to 6 carbon atoms, the multiple bond thereof being other than adjacent to the nitrogen atom of the tricyclic ring system, oxoalkyl of 2 to 5 carbon atoms, the oxygen atom thereof being separated by at least two carbon atoms from the nitrogen atom of the tricyclic ring system, or phenylalkyl of 7 to 10 carbon atoms, R.sub.3 is hydrogen or alkyl of 1 to 4 carbon atoms, And R.sub.4 is hydrogen or alkyl of 1 to 4 carbon atoms, Useful as antidepressants.
本发明提供了一种新的化合物,其
化学式为I,##STR1## 其中R.sub.1为氢、烷基或1到4个碳原子、
氟、
氯或
溴,R.sub.2为氢、1到4个碳原子的烷基、4到10个碳原子的环烷基烷基、3到6个碳原子的烯基或炔基,其多重键不与
三环环系的氮原子相邻,2到5个碳原子的氧代烷基,其中氧原子距离
三环环系的氮原子至少有两个碳原子,或7到10个碳原子的苯基烷基,R.sub.3为氢或1到4个碳原子的烷基,R.sub.4为氢或1到4个碳原子的烷基。可用作抗抑郁剂。