The presence of an antidepressant effect in a series of N-dialkylaminoalkyl-substituted 2, 3- polymethylenindoles [1], tetrahydrocarbazoles, benztetrahydrocarbazoles, thiopyranoindoles [2], and benzthlopyranoindole [3] has stimulated the synthesis of a series
![9-methyl-7,12-dihydro-6H-benzo[2,3]oxepino[4,5-b]indole Structure](https://image.chemsrc.com/caspic/312/33177-03-6.png)
![6,7-Dihydro-9-methyl-N,N-dimethyl-12H-[1]benzoxepino[5,4-b]indole-12-propan-1-amine Structure](https://image.chemsrc.com/caspic/075/37683-60-6.png)
![6,7-Dihydro-9-methyl-N,N-dimethyl-12H-[1]benzoxepino[5,4-b]indole-12-ethanamine Structure](https://image.chemsrc.com/caspic/044/37683-56-0.png)
![7,12-dihydro-6H-benzo[2,3]oxepino[4,5-b]indole Structure](https://image.chemsrc.com/caspic/350/33177-02-5.png)
![6,7-Dihydro-N,N-dimethyl-12H-[1]benzoxepino[5,4-b]indole-12-propan-1-amine Structure](https://image.chemsrc.com/caspic/430/37683-59-3.png)