Synonyms: Aspidospermidin-21-oicacid,3,4-didehydro-15-(2,3,3a,5,6,11c-hexahydro-8,11c-dihydroxy-3-methyl-6-oxo-1H-indolo[3,2,1-de][1,5]naphthyridin-11b(4H)-yl)-17,19-dihydroxy-16-methoxy-1-methyl-,g-lactone, [15(11bR,11cR)]-;13a,3a-(Epoxyethano)-1H-indolizino[8,1-cd]carbazole, aspidospermidin-21-oicacid deriv.; 1H-Indolo[3,2,1-de][1,5]naphthyridine, aspidospermidin-21-oic acidderiv.; (-)-Crooksiine; Crooksiine; O17-Demethylcimiciphytine