Synonyms: 8,17-Cyclo-7,17-secoaconitan-7-one,20-ethyl-1,14-dihydroxy-6,16-dimethoxy-4-(methoxymethyl)-, (1a,6b,14a,16b)-; Delcosine, anhydro- (8CI);7,9-Methano-11a,3,6a-[1]propanyl[3]ylidene-2H-indeno[1,2-b]azocin-12-one, 1-ethyldodecahydro-6,8-dihydroxy-10,13-dimethoxy-3-(methoxymethyl)-,[3S-(3a,6a,6ab,7a,7ab,8a,9a,10b,11ab,11ba,13R*,14S*)]-; Anhydrodelcosine