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9-Oxo-7-nitro-4,9-dihydropyrazolo[1,5-a]pyrido[2,3-d]pyrimidine-2-carboxylic acid ethyl ester Structure

9-Oxo-7-nitro-4,9-dihydropyrazolo[1,5-a]pyrido[2,3-d]pyrimidine-2-carboxylic acid ethyl ester