Ethyl 2-bromo-6-(difluoromethyl)-3-iodopyridine-4-carboxylate
6-Bromo-2-(difluoromethyl)-4-hydroxypyridine-3-sulfonyl chloride
Ethyl 6-bromo-3-(difluoromethyl)-2-iodopyridine-4-carboxylate
2-Bromo-6-(difluoromethyl)-3-hydroxypyridine-5-sulfonyl chloride