(+)-Dicrotaline 17,19,20-Trinorcrotalanan-11,15-dione, 13-hydroxy-, (13alpha)- 2H-(1,6)Dioxacycloundecino(2,3,4-gh)pyrrolizine-2,6(3H)-dione, 4,5,8,10,12,13,13a,13b-octahydro-4-hydroxy-4-methyl-, (4S-(4R*,13aS*,13bR*))- 480-87-5