Synonyms: 2-Butanone,4-(4-acetyl-1,4a,5,6,7,12,13,13a-octahydro-9-methoxy-7,14-dimethyl-6,13-iminopyrano[3',4':5,6]cyclooct[1,2-b]indol-10-yl)-3-[6,7,8,9,10,11-hexahydro-9-(hydroxymethyl)-5,12-dimethyl-6,10-imino-5H-cyclooct[b]indol-8-yl]-(7CI,8CI); Alstophyllan-19-one,10-(19,20-dihydro-17-hydroxy-1,4-dimethyl-19-oxo-4,21-secosarpagan-21-yl)-11-methoxy-;Macralstonine B