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