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