Ethyl 5-chloro-2-cyano-4-(difluoromethyl)pyridine-3-carboxylate
Ethyl 5-chloro-2-cyano-3-(difluoromethyl)pyridine-4-carboxylate
Ethyl 4-chloro-3-cyano-6-(difluoromethyl)pyridine-2-carboxylate
5-Chloro-4-cyano-2-(difluoromethyl)-3-iodopyridine
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