beta-D-GlcpA-(1->2)beta-D-Xylp-(1->2)beta-D-Xylp-(1->2)[beta-D-Xylp-(1->4)]-alpha-D-Manp-(1->3)[beta-D-Xylp-(1->4)]-alpha-D-Manp-(1->3)[beta-D-Xylp-(1->4)-beta-D-Xylp-(1->4)]-?-D-Manp(1->