Synonyms: Isoatisine,7,20-epoxy-, (7a,15a,19S,20R)-; (15a,19S)-23-Deoxy-19,23-epoxyajaconine;12aH,14H-3,14a-Ethano-14,4b,8-ethanylylidene-1H,5H-[2]benzopyrano[4,3-g]oxazolo[3,2-a]azocin-1-ol,decahydro-8-methyl-2-methylene-, [1S-(1a,3a,4ab,4bb,8b,8aa,12ab,14b,14aa,18S*)]-; Spiramine C