D-gro-alpha-L-3-deoxy-galNon2ulop5NAc-onic-(2->8)-D-gro-alpha-L-3-deoxy-galNon2ulop5NAc-onic-(2->8)-D-gro-alpha-L-3-deoxy-galNon2ulop5NAc-onic-(2->8)-D-gro-?-L-3-deoxy-galNon2ulop5NAc-onic(2->