3-Bromo-6-(difluoromethyl)-4-hydroxypyridine-2-carbonyl chloride
Methyl 5-bromo-2-(difluoromethyl)-4-iodopyridine-3-carboxylate
Methyl 5-bromo-2-(difluoromethyl)-3-iodopyridine-4-carboxylate
Methyl 4-bromo-3-(difluoromethyl)-6-iodopyridine-2-carboxylate