4-Hydroxy-2-(pyridin-4-yl)pyrimidine-5-carboxylic acid,1,6-dihydro-6-oxo-2-(4-pyridinyl)-5-pyrimidinecarboxylic acid

4-Hydroxy-2-(pyridin-4-yl)pyrimidine-5-carboxylic acid,1,6-dihydro-6-oxo-2-(4-pyridinyl)-5-pyrimidinecarboxylic acid

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