alpha-D-Neup5Ac-(2->3)-beta-D-Galp-(1->3)[alpha-D-Neup5Ac-(2->3)-?-D-Galp-(1->?)-beta-D-GlcpNAc-(1->3)-beta-D-Galp-(1->?)[alpha-L-Fucp-(1->?)]-beta-D-GlcpNAc-(1->6)]-alpha-D-GalpNAc-(1->
