3,19-dihydroxyl-16,21-epoxy-18,19-seco-13(18)-urs-ene-28-oic-acid-19-O-alpha-L-rhamnopyranosyl-(1-2)-alpha-L-arabinopyranoside
3,19-dihydroxyl-16,21-epoxy-18,19-seco-13(18)-urs-ene-28-oic-acid-19-o-alpha-l-rhamnopyranosyl-(1-2)-alpha-l-arabinopyranoside