Synonyms: 1,5-Methano-10H-pyrido[1,2-a][1,5]diazocin-10-one,3-(3-butenyl)-1,2,3,4,5,6,11,11a-octahydro-, (1S,5R,11aR)- (9CI);1,5-Methano-10H-pyrido[1,2-a][1,5]diazocin-10-one,3-(3-butenyl)-1,2,3,4,5,6,11,11a-octahydro-, [1S-(1a,5a,11aa)]-;(-)-11,12-Seco-12,13-didehydromultiflorine; 11,12-Seco-12,13-didehydromultiflorine