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