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