?-D-NeupAc-(2->?)-?-D-Galp-(1->?)-?-D-GlcpNAc-(1->?)-?-D-Manp-(1->?)[?-D-NeupAc-(2->?)-?-D-Galp-(1->?)-?-D-GalpNAc-(1->?)-?-D-Manp-(1->?)]-?-D-Manp-(1->?)-?-D-GlcpNAc-(1->?)-D-GlcNAc(?->