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