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