Methyl 3-bromo-2-(difluoromethyl)-4-fluoropyridine-6-carboxylate
Methyl 2-bromo-3-cyano-4-(difluoromethyl)pyridine-5-acetate
Methyl 6-bromo-2-(difluoromethyl)-4-fluoropyridine-3-carboxylate
Methyl 2-bromo-6-(difluoromethyl)-3-fluoropyridine-5-carboxylate