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