Synonyms: 20-Norcrotalanan-11,15-dione,3,8-didehydro-14,19-dihydro-12,13-dihydroxy-, (13a,14a)-; Monocrotaline, 3,8-didehydro- (8CI); (+)-Dehydromonocrotaline;2H-[1,6]Dioxacycloundecino[2,3,4-gh]pyrrolizine-2,6(3H)-dione,4,5,8,12,13,13a-hexahydro-4,5-dihydroxy-3,4,5-trimethyl-, [3R-(3R*,4R*,5R*,13aR*)]-;3,8-Didehydromonocrotaline; Dehydromonocrotaline; Monocrotaline pyrrole