(16-alpha)-14,15-Dihydro-20,21-dinoreburnamenine 1H-Indolo(3,2,1-de)pyrido(3,2,1-ij)(1,5)naphthyridine, 2,3,5,6,12,13,13a,13b-octahydro- 20,21-Dinoreburnamenine, 14,15-dihydro-, (16-alpha)- 86680-44-6