alpha-D-GlcpA4Me-(1->2)[[4)-beta-D-Xylp-(1->4)-beta-D-Xylp-(1->4)-beta-D-Xylp-(1->4)-beta-D-Xylp-(1->4)-beta-D-Xylp-(1->4)-beta-D-Xylp-(1->4)]-beta-D-Xylp-(1->]n