Ethyl 2-bromo-4-(difluoromethyl)-5-methylpyridine-3-carboxylate
4-Bromo-6-(difluoromethyl)-2-methoxypyridine-3-carbonyl chloride
Ethyl 2-bromo-4-(difluoromethyl)-3-methylpyridine-5-carboxylate
Ethyl 2-bromo-3-(difluoromethyl)-6-methylpyridine-4-carboxylate