Ethyl 2-(aminomethyl)-5-bromo-3-(difluoromethyl)pyridine-6-carboxylate
Ethyl 6-(aminomethyl)-4-bromo-2-(difluoromethyl)pyridine-3-carboxylate
3-Bromo-4-(difluoromethyl)-5-methoxypyridine-2-sulfonyl chloride
3-Bromo-4-(difluoromethyl)-2-methoxypyridine-5-sulfonyl chloride