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