Similar names: 20-Norcrotalanan-11,15-dione, 14,19-dihydro-12,13-dihydroxy-, (13α,14α)-; Monocrotaline (6CI,7CI,8CI); (3R,4R,5R,13aR,13bR)-4,5,8,10,12,13,13a,13b-Octahydro-4,5-dihydroxy-3,4,5-trimethyl-2H-[1,6]dioxacycloundecino[2,3,4-gh]pyrrolizine-2,6(3H)-dione; 2H-[1,6]Dioxacycloundecino[2,3,4-gh]pyrrolizine, 20-norcrotalanan-11,15-dione deriv.; (-)-Monocrotaline; 2H-[1,6]Dioxacycloundecino[2,3,4-gh]pyrrolizine-2,6(3H)-dione, 4,5,8,10,12,13,13a,13b-octahydro-4,5-dihydroxy-3,4,5-trimethyl-, [3R-(3R*,4R*,5R*,13aR*,13bR*)]-; Monocrotalin; NSC 28693