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6-Hydroxy-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-5-carboxylic acid (2-hydroxy-ethyl)-amide
6-Hydroxy-4-oxo-1,2-dihydro-4H-pyrrolo[3,2,1-ij]quinoline-5-carboxylic acid [2-(4-methoxy-phenyl)-ethyl]-amide
6-Hydroxy-4-methyl-1-(2-methylpropyl)-2-oxo-1,2-dihydropyridine-3-carbonitrile
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