2-(Difluoromethyl)-6-nitropyridine-3-carboxylic acid
2-(Difluoromethyl)-4-nitropyridine-3-carboxylic acid
5-(Difluoromethyl)-2-(trifluoromethyl)pyridine-4-carboxylic acid
3-(Difluoromethyl)-2-(trifluoromethyl)pyridine-5-carboxylic acid
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