[?-D-Glcp-(1->4)-[?-?-Hep?-(1->7)-L-gro-?-D-manHepp-(1->7)-[?-D-GlcpNAc-(1->3)-[?-D-Glc?-(1->2)-L-gro-?-D-manHepp-(1->3)]]-L-gro-?-D-manHepp-(1->5)]-?-L-3-deoxy-manOct2ulo?-onic-(2->4)-L-3-deoxy-manOct2ulo-onic(?-]-