10H-indolizino[1',8':2,3,4]cyclopenta[1,2-c]quinolin-1(2H)-one, 12a-ethenyl-7,8,12a,12b,13,13a-hexahydro- 12a-vinyl-7,8,12a,12b,13,13a-hexahydro-10H-indolizino[1',8':2,3,4]cyclopenta[1,2-c]quinolin-1(2H)-one InChI=1/C19H20N2O/c1-2-18-8-5-10-21-11-9-19(17(18)21)13-6-3-4-7-15(13)20-16(22)14(19)12-18/h2-8,14,17H,1,9-12H2,(H,20,22