Gal(b1-4)GlcNAc(a1-2)Man(a1-3)[GlcNAc(b1-4)][Neu5Ac(?2-?)Gal(b1-4)GlcNAc(b1-2)Man(a1-6)]Man(b1-4)GlcNAc(b1-4)[Fuc(a1-6)]GlcNAc(b1-