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