Synonyms: 4,21-Secosarpagan-19(20H)-one,20,21-didehydro-17-hydroxy-1,4-dimethyl-; Macroline (7CI); (+)-Macroline;21,24-Secoalstophyllan-19-one; 3-Buten-2-one,3-[6,7,8,9,10,11-hexahydro-9-(hydroxymethyl)-5,12-dimethyl-6,10-imino-5H-cyclooct[b]indol-8-yl]-,[6S-(6a,8a,9a,10a)]-