beta-D-GlcpNAc-(1->2)-?-D-Manp-(1->?)[beta-D-GlcpNAc-(1->2)-?-D-Manp-(1->?)]-?-D-Manp-(1->?)-?-D-GlcpNAc-(1->?)-?-D-GlcpNAc-(1->
