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5-Hydroxy-4-methylpyrimidine

3-Hydroxy-5-nitrobenzoic acid

2-Hydroxy-3-nitropyridine

3-Hydroxy-4-nitropyridine

3-Hydroxy-5-nitropyridine

8-Hydroxy-6-nitroquinoline

3-Hydroxypyridine-4-carboxylic acid ethyl ester

4-Hydroxy-2-pyridinecarboxylic acid ethyl ester

5-Hydroxypyridine-3,4-dicarboxylic acid methyl ester

3-Hydroxyquinoline-2-carboxylic acid

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