?-D-Glc?N-(1->?)-?-D-Glc?N-(1->?)-?-D-Glc?N-(1->?)-?-D-Glc?N-(1->?)-?-D-Glc?N-(1->?)-?-D-Glc?N-(1->?)-?-D-Glc?N-(1->?)-D-GlcN(?->