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