213478-78-5

5b,9a-Propano-7H-1,3-dioxolo[4,5-a]pyrido[2,- 3-g]carbazole-11a,12-dicarboxylic acid,6-formyl-5c,6,8,9,10,11-hexahydro-14- oxo-,dimethyl ester,(5bR,5cS,9aR,11aS)-