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