(4S,7S,10R,13R)-10-Ethenyl-1,3,4,5,7,8,10,11,12,13-decahydro-4-(methoxymethyl)-8,10,13-trimethyl-7,13-diisopropyl-6H-benzo[g][1,4]diazonino[7,6,5-cd]indol-6-one