Synonyms: 18,19-Secostrychnidine;6,4-(Iminomethano)oxepino[2,3,4-de]indolo[3,2,1-ij]quinoline,6a-ethyl-2,4a,5,6,6a,12,13,13a,13b,13c-decahydro-, [4aR-(4aa,6b,6ab,13aa,13ba,13cb)]-; [4aR-(4aa,6b,6ab,13aa,13ba,13cb)]-6a-Ethyl-2,4a,5,6,6a,12,13,13a,13b,13c-decahydro-6,4-(iminomethano)oxepino[2,3,4-de]indolo[3,2,1-ij]quinoline