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