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