Synonyms: 20-Norcrotalanan-11,15-dione,14,19-dihydro-12,13-dihydroxy-, 13-(2-methylbutanoate), [13a(R),14a]-; Grahamine (8CI);2H-[1,6]Dioxacycloundecino[2,3,4-gh]pyrrolizine, 20-norcrotalanan-11,15-dionederiv.; Grahamine (Crotalaria); Monocrotaline 3'-[(-)-2-methylbutyrate]