?-D-GlcpNAc-(1->?)-?-D-Galp-(1->?)-?-D-GlcpNAc-(1->?)-?-D-Galp-(1->?)[?-D-Galp-(1->?)-?-D-Galp-(1->?)]-?-D-Galp-(1->?)-?-D-GalpNAc(1->