1 DUO 4-hydroxy-2,8-dimethyl-1-oxo-6-(4,5,6-trimethoxy-1h-indole-2-carbonyl)-1,2,3,6,7,8-hexahydro-3,6-diaza-as-indacene-2-carboxylic acid methyl ester 1.000 2 DSA 4-hydroxy-8-methyl-6-(4,5,6-trimethoxy-1h-indole-2-carbonyl)-3,6,7,8-tetrahydro-3,6-diaza-as-indacene-2-carboxylic acid methyl ester 0.946 3 DSI 4-hydroxy-6-(1h-indole-2-carbonyl)-8-methyl-3,6,7,8-tetrahydro-3,6-diaza-as-indacene-2-carboxylic acid methyl ester 0.784 4 YNY Methyl (8r)-8-{[(4p)-6-amino-3h-purin-3-yl]methyl}-4-hydroxy-6-(5,6,7-trimethoxy-1h-indole-2-carbonyl)-3,6,7,8-tetrahydropyrrolo[3,2-E]indole-2-carboxylate 0.745