(1aS,1bS,1b1R,2R,3S,3aR,8bR,12aR)-methyl 2-acetoxy-1b-ethyl-7-((5S,7R,9S)-5-ethyl-5-hydroxy-9-(methoxycarbonyl)-15-oxo-2,4,5,6,7,8,9,10-octahydro-1H-3,7-methano[1]azacycloundecino[5,4-b]indol-9-yl)-3-hydroxy-6-methoxy-4-methyl-1b,1b1,2,3,3a,4,9,10,12,12a-decahydro-1aH-oxireno[2',3':6,7]indolizino[8,1-cd]carbazole-3-carboxylate
