[beta-D-GlcpN-(1->7)-[alpha-L-GalpN-(1->4)-alpha-D-Glcp-(1->2)-beta-D-Glcp-(1->4)-beta-D-Glcp-(1->4)-beta-D-Glcp-(1->3)-alpha-D-GlcpA2NAc-(1->4)]-?-3-deoxy-octOct-onic(?-]-