Synonyms: 3,6-Methano-8H-1,5,7-trioxacyclopenta[ij]cycloprop[a]azulene-4,8(3H)-dione,hexahydro-2a-hydroxy-8b-methyl-9-(1-methylethyl)-, [1aR-(1aa,2ab,3b,6b,6ab,8aS*,8bb,9S*)]-; Picrotoxinin, a-dihydro- (6CI,8CI); Dihydropicrotoxinin; a-Dihydropicrotoxinin