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