[alpha-D-GlcpN-(1->7)-alpha-?-Hepp-(1->7)-[alpha-D-Glcp-(1->3)-alpha-?-Hepp-(1->3)]-alpha-?-Hepp4P-(1->5)-alpha-L-3-deoxy-manOct2ulop-onic-(2->4)-alpha-L-3-deoxy-manOct2ulop-onic(2-]-