Methyl 2-chloro-4-(difluoromethyl)pyridine-5-carboxylate
Methyl 2-chloro-3-(difluoromethyl)pyridine-6-carboxylate
3-Chloro-6-(difluoromethyl)pyridine-2-carboxylic acid
5-Chloro-2-(difluoromethyl)pyridine-3-carboxylic acid
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