Synonyms: N-Desmethoxyrankinidine;N-Demethoxyrankinidine;Humantenine, 1-demethoxy-4-demethyl-;122590-02-7;Spiro(3H-indole-3,8'(7'H)-(4,7)methanooxepino(4,3-b)pyridin)-2(1H)-one, 3'-ethylidene-1',2',3',4',4'a,5',9',9'a-octahydro-, (3S,3'Z,4'R,4'aS,7'R,9'aS)-