[beta-D-Glcp-(1->4)-[beta-L-Galp-(1->7)-L-gro-alpha-D-manHep?-(1->7)-[beta-D-GlcpNAc-(1->3)-L-gro-alpha-D-manHep?-(1->3)]-L-gro-alpha-D-manHep?-(1->5)]-D-gro-alpha-D-talOct2ulop-onic-(2->4)-?-L-3-deoxy-manOct2ulop-onic(2-]-