diethyl (6aS,9R,9aS)-8-acetyl-7,7-dimethyl-6,6a,7,8,9,9a-hexahydro-2H-isoindolo[4,5,6-cd]indole-2,9-dicarboxylate

(3R,4R)-4-Acetyl-3-(acetylamino-ethoxycarbonyl-methyl)-4,5-dihydro-3H-benzo[cd]indole-1-carboxylic acid ethyl ester

diethyl (6aS,9R,9aS)-8-acetyl-7-methyl-7-(phenylthio)-6,6a,7,8,9,9a-hexahydro-2H-isoindolo[4,5,6-cd]indole-2,9-dicarboxylate

buta-1,3-diene-1,4-dione