Synonyms: 1,16:2,4(7H)-Dicyclo-3,4-secocorynan-17-oicacid, 10-[10,17-dimethoxy-1-methyl-17-oxo-2,4(1H)-cyclo-3,4-secoakuammilan-11-yl]-19,20-dihydroxy-11-methoxy-,g-lactone, (7a,16S,19R)-;2,4(1H)-Cyclo-3,4-secoakuammilan, 1,16:2,4(7H)-dicyclo-3,4-secocorynan-17-oicacid deriv.; (-)-Ceylanine; 13H-3,8a-Methano-1H-azepino[1',2':1,2]pyrrolo[2,3-b]indole-14-carboxylicacid,4-ethylidene-2,3,4,5,7,8-hexahydro-10-methoxy-13-methyl-11-[1,3,3a,4,5,8,8a,13a-octahydro-3-(1-hydroxyethyl)-11-methoxy-1-oxo-7H-3,6-methanofuro[3',4':5,6]pyrido[1,2-a]pyrrolo[2,3-b]indol-10-yl]-,methyl ester, [3R-[3a,4E,8aa,11[3S*(R*),3aR*,5aS*,8aR*,13aS*],13aR*,14R*]]-;Ceylanine