?-D-GlcpNAc-(1->?)-?-D-Glcp-(1->?)-?-D-Galp-(1->?)-?-D-Glcp-(1->?)[L-gro-?-D-manHep?-(1->?)]-L-gro-?-D-manHep?-(1->?)-L-gro-D-manHep(?->