Ethyl 2,3-difluoro-6-(difluoromethyl)pyridine-4-carboxylate
Ethyl 3-amino-6-chloro-4-(difluoromethyl)pyridine-2-carboxylate
Ethyl 5-amino-2-chloro-3-(difluoromethyl)pyridine-4-carboxylate
Ethyl 6-amino-3-(difluoromethyl)-4-iodopyridine-2-carboxylate
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