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