methyl 6-(aminocarbonyl)-3,6,7,8-tetrahydro-5-hydroxy-4-methoxybenzo[1,2-b:4,3-b']dipyrrole-2-carboxylate

benzyl 4-benzyloxy-3-carbamoyl-5-methoxy-1,2,3,6-tetrahydropyrrolo[3,2-e]indole-7-carboxylate

4-((diethoxyphosphoryl)oxy)-5-methoxy-7-(methoxycarbonyl)-3,6-dihydropyrrolo[3,2-e]indole-1-carboxylic acid

benzyl 3,6-dihydro-4-((diethoxyphosphinyl)oxy)-5-methoxy-7-(methoxycarbonyl)benzo(1,2-b:4,3-b')dipyrrole-1-carboxylate

benzyl 3,6-dihydro-4-((diethoxyphosphinyl)oxy)-5-methoxy-7-(methoxycarbonyl)-6-((4-methylphenyl)sulfonyl)benzo[1,2-b:4,3-b']dipyrrole-1-carboxylate