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