Synonyms: 23,24-Secovillalstonine,23,41-didehydro-; Villamine (7CI,8CI); 6,10-Imino-5H-cyclooct[b]indole,23,24-secovillalstonine deriv.; (+)-Villamine;2H-12a,7a-(Epoxy[1]propeno)-2,12-methanoindolo[2,3-a]quinolizine-17-carboxylicacid,3-ethylidene-15-[6,7,8,9,10,11-hexahydro-9-(hydroxymethyl)-5,12-dimethyl-6,10-imino-5H-cyclooct[b]indol-8-yl]-1,3,4,6,7,12b-hexahydro-14-methyl-,methyl ester, [2S-[2a,3E,7ab,12a,12ab,12bb,15(6R*,8R*,9S*,10R*)]]-