beta-D-GlcpNAc-(1->3)[D-gro-alpha-D-manHepp-(1->7)-L-gro-alpha-D-manHepp-(1->7)]-L-gro-alpha-D-manHepp-(1->3)[beta-D-Glcp-(1->4)]-L-gro-alpha-D-manHepp-(1->5)-D-Kdn(?->