[alpha-L-Araf-(1->3)-[alpha-L-Araf-(1->2)-beta-D-Xylp-(1->4)]-[alpha-L-Araf-(1->3)-alpha-L-Araf-(1->2)-beta-D-Xylp-(1->4)]]-beta-D-Xylp-(1->4)-?-D-Xylp(1->