Ethyl 3-chloro-4-(difluoromethyl)-2-fluoropyridine-5-carboxylate
Methyl 5-(aminomethyl)-3-bromo-4-(difluoromethyl)pyridine-2-carboxylate
Ethyl 3-chloro-2-(difluoromethyl)-6-fluoropyridine-4-carboxylate
Methyl 3-(aminomethyl)-5-bromo-2-(difluoromethyl)pyridine-6-carboxylate