alpha-D-Glc?N-(1->7)-L-gro-alpha-D-manHep?-(1->2)-L-gro-alpha-D-manHep?-(1->3)beta-D-Glc?-(1->4)[alpha-D-Glc?-(1->6)]-L-gro-alpha-D-manHep?-(1->5)-alpha-D-Kdo?4P(2->