[beta-L-GalpNAc-(1->4)-[alpha-L-GalpNAc-(1->2)-alpha-D-Fucp-(1->3)-beta-D-GlcpNAc-(1->6)]-[beta-L-GalpNAc-(1->4)-alpha-L-GalpNAc-(1->2)-alpha-D-Fucp-(1->3)-beta-D-GlcpNAc-(1->3)]-?-L-GalpNAc(1-]-