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