5-Amino-3-chloro-4-(difluoromethyl)pyridine-2-carboxylic acid
3-Amino-5-chloro-2-(difluoromethyl)pyridine-4-carboxylic acid
3-Amino-2-(difluoromethyl)-5-fluoropyridine-4-carboxylic acid
6-Amino-2-(difluoromethyl)-3-fluoropyridine-4-carboxylic acid
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