[alpha-D-GlcpA-(1->3)-alpha-L-Manp-(1->4)-alpha-D-Glcp-(1->3)-beta-D-Glcp-(1->4)-alpha-D-GlcpA-(1->3)-beta-L-Manp-(1->4)]-alpha-D-Glcp-(1->3)-?-D-Glcp(1->