7-Benzyloxy-3-[2-(3,4-dimethoxy-phenyl)-ethyl]-1-(3-isopropoxy-4-methoxy-phenyl)-8-methoxy-3H-chromeno[3,4-b]pyrrol-4-one

3-Benzyloxy-13-(3-isopropoxy-4-methoxy-phenyl)-2,10,11-trimethoxy-7,8-dihydro-5-oxa-6b-aza-dibenzo[a,i]fluoren-6-one

7-Benzyloxy-3-[2-(3,4-dimethoxy-phenyl)-ethyl]-1-(3-isopropoxy-4-methoxy-phenyl)-8-methoxy-4-oxo-3,4-dihydro-chromeno[3,4-b]pyrrole-2-carboxylic acid methyl ester

7-Benzyloxy-3-[2-(3,4-dimethoxy-phenyl)-ethyl]-1-(3-isopropoxy-4-methoxy-phenyl)-8-methoxy-4-oxo-3,4-dihydro-chromeno[3,4-b]pyrrole-2-carboxylic acid

dimethyl 3,4-dihydroxy-1-[2-(3,4-dimethoxyphenyl)ethyl]pyrrole-2,5-dicarboxylate