2-Bromo-5-(difluoromethyl)-3-fluoropyridine-4-sulfonyl chloride
2-Bromo-4-(difluoromethyl)-6-fluoropyridine-3-sulfonyl chloride
2-Bromo-4-(difluoromethyl)-5-fluoropyridine-3-sulfonyl chloride
6-Bromo-4-(difluoromethyl)-2-iodopyridine-3-carboxylic acid