6-Cyanoimidazo[1,2-a]pyridine-2-carboxylic acid
7-Methoxyimidazo[1,2-a]pyridine-2-carboxylic acid
8-Aminoimidazo[1,2-a]pyridine-2-carboxylic acid
8-Nitroimidazo[1,2-a]pyridine-2-carboxylic acid
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