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