?-D-GalpNAc3S-(1->?)-?-D-GlcpNAc-(1->?)-?-D-Manp-(1->?)[?-D-GalpNAc3S-(1->?)-?-D-GlcpNAc-(1->?)-?-D-Manp-(1->?)]-?-D-Manp-(1->?)-?-D-GlcpNAc-(1->?)-D-GlcNAc(?->