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