scammonin VII

Hexadecanoic acid, 11-((o-(E)-6-deoxy-4-o-(2-methyl-1-oxo-2-butenyl)-beta-D-glucopyranosyl-(1-4)-o-(S)-6-deoxy-2-o-(2-methyl-1-oxobutyl)-alpha-L-mannopyranosyl-(1-2)-o-beta-D-glucopyranosyl-(1-2)-6-deoxy-beta-D-galactopyranosyl)oxy)-, intramol. 1,3'''-ester, (S)-