preferred_name: 5-aminopentyl 2,3-di-acetamido-2,3-di-deoxy-alpha-D-galacturonamidyl-(1->4)-2,3-di-acetamido-2,3-di-deoxy-beta-D-glucuronamidyl-(1->4)-2,3-di-acetamido-2,3-di-deoxy-beta-D-glucuronamidyl-(1->4)-2,3-di-acetamido-2,3-di-deoxy-alpha-D-galacturonamide