Pyrrolo-Annellated Carbazoles as Potential Antitumour-Active Compounds: Dimethyl 4-Methoxy-9-methyl-9H-carbazole-1,2-dicarboxylate and 5-Hydroxy-2-phenyl-10-methyl-1,2,3,10-tetrahydropyrrolo[3,4-a]carbazole-1,3-dione Methanol Solvate

The structures of the title compounds, C₁₈H₁₇NO₅ and C₂₁H₁₄N₂O₃.CH₄O, were determined. The crystal structure of the first shows significant variations between its two independent molecules; that of the second is characterized by hydrogen bonds to the co-crystallized methanol.

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