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