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