Synonyms: 5,9-Methanocycloocta[b]pyridin-2(1H)-one,5-amino-11-ethylidene-5,6,9,10-tetrahydro-7-methyl-, (5a,9b,11E)-(?à)-; (?à)-Huperzine A;5,9-Methanocycloocta[b]pyridin-2(1H)-one,5-amino-11-ethylidene-5,6,9,10-tetrahydro-7-methyl-, (5a,9b,11E)-; Fordine