Ethyl 2-bromo-4-(difluoromethyl)-3-hydroxypyridine-6-carboxylate
Ethyl 2-bromo-3-(difluoromethyl)-6-hydroxypyridine-5-carboxylate
Ethyl 2-bromo-3-(difluoromethyl)-4-hydroxypyridine-6-carboxylate
Methyl 3-bromo-6-(difluoromethyl)-2-hydroxypyridine-4-carboxylate