Methyl 6-bromo-3-cyano-4-(difluoromethyl)pyridine-2-carboxylate
Methyl 2-bromo-5-cyano-3-(difluoromethyl)pyridine-6-carboxylate
Methyl 6-bromo-4-cyano-2-(difluoromethyl)pyridine-3-carboxylate
4-Bromo-3-(difluoromethyl)-6-hydroxypyridine-2-sulfonamide