[beta-L-Glcp3Me6S-(1->3)-beta-L-Glcp6S-(1->4)-[beta-D-Xylp-(1->2)-beta-L-Quip-(1->2)]-beta-D-Xylp4S-(1->2)-beta-L-Glcp3Me6S-(1->3)-beta-L-Glcp6S-(1->4)-beta-D-Xylp-(1->2)-beta-L-Quip-(1->2)]-?-D-Xylp4S(1->