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