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