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