α-D-Neup5Ac-(2→7)-α-D-Neup5Ac-(2→7)-α-D-Neup5Ac-(2→3)[α-D-Neup5Ac-(2→3)-β-D-Galp-(1→3)-β-D-GalpNAc-(1→4)]-β-D-Galp-(1→4)-?-D-Glc
