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