(3beta,21S)-3-[(O-6-Deoxy-alpha-L-mannopyranosyl-(1$rarr$2)-O-[beta-D-xylopyranosyl-(1$rarr$3)]-alpha-L-arabinopyranosyl)oxy]-21,23-epoxy-20,21-dihydroxydammar-24-en-19-al [ 157752-01-7 ]