Ethyl 6-(aminomethyl)-3-bromo-4-(difluoromethyl)pyridine-2-carboxylate
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