Ethyl 4-bromo-2-(difluoromethyl)-3-hydroxypyridine-5-carboxylate
Ethyl 3-bromo-5-(difluoromethyl)-6-hydroxypyridine-2-carboxylate
3-Bromo-6-(difluoromethyl)-4-fluoropyridine-2-sulfonamide
Ethyl 3-bromo-5-(difluoromethyl)-4-hydroxypyridine-2-carboxylate