Ethyl 5-bromo-3-(bromomethyl)-4-(difluoromethyl)pyridine-2-carboxylate
Methyl 2-bromo-3-(difluoromethyl)-5-methylpyridine-4-carboxylate
Ethyl 3-bromo-5-(bromomethyl)-2-(difluoromethyl)pyridine-6-carboxylate
Methyl 2-bromo-3-(difluoromethyl)-4-methylpyridine-5-carboxylate