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