alpha-D-GlcpA-(1->2)[alpha-D-GlcpN-(1->7)]-L-gro-alpha-D-manHepp-(1->3)[alpha-D-GlcpN-(1->4)[alpha-?-GalpA2N-(1->6)]-beta-?-Glcp-(1->4)]-L-gro-alpha-D-manHepp-(1->5)-alpha-D-Kdop4PEtn(2->