2H,12H-6,12a-epoxy-2,7a-methanoindolo[2,3-a]quinolizine-14-carboxylic acid, 3-ethylidene-1,3,4,6,7,12b-hexahydro-, methyl ester, (2S,3E,6S,12aR,12bS)- 4684-32-6 InChI=1/C20H22N2O3/c1-3-11-10-22-15-8-12(11)17(18(23)24-2)19-9-16(22)25-20(15,19)21-14-7-5-4-6-13(14)19/h3-7,12,15-17,21H,8-10H2,1-2H3/b11-3-/t12-,15+,16+,17?,19?,20+/m1/s Picrinin methyl (2alpha,5alpha,15alpha,16xi,19E)-1,2-dihydro-2,5-epoxyakuammilan-17-oate