beta-D-GlcpNAc6Gc-(1->4)-beta-D-GlcpNAc6Gc-(1->4)-beta-D-GlcpNAc6Gc-(1->4)-beta-D-GlcpNAc6Gc-(1->4)-beta-D-GlcpNAc6Gc-(1->4)-D-GlcNAc6Gc(?->