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