[beta-D-Glc?-(1->4)-[beta-L-Gal?-(1->7)-L-gro-alpha-D-manHepp-(1->7)-beta-D-Glc?NAc-(1->3)-L-gro-alpha-D-manHepp-(1->3)]-L-gro-alpha-D-manHepp-(1->5)]-L-3-deoxy-manOct2ulo-onic(?->