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