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