28-O-beta-D-xylopyranosyl-(1->4)-alpha-L-rhamnopyranosyl-(1->2)-(alpha-L-(5-O-acetyl)-arabinofuranosyl-(1->3))-beta-D-(4-O-acetyl)-fucopyranosyl-quillaic acid-3-O-beta-D-galactopyranosyl-(1->2)-beta-D-glucuronopyranoside