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