The molecule is a triterpenoid saponin with rubiarbonol A as the aglycone. It has been isolated from the roots of Rubia yunnanensis. It has a role as a plant metabolite. It is a beta-D-glucoside, a triol, a disaccharide derivative, a pentacyclic triterpenoid and a triterpenoid saponin. It derives from a rubiarbonol A.
(2S,3R,4S,5S,6R)-2-[(2R,3R,4S,5S,6R)-2-[[(1R,3S,3aR,5aS,5bS,6S,7aR,9S,11aS,13aR,13bR)-1,6-dihydroxy-3a-(hydroxymethyl)-5a,8,8,11a,13a-pentamethyl-3-propan-2-yl-1,2,3,4,5,5b,6,7,7a,9,10,11,13,13b-tetradecahydrocyclopenta[a]chrysen-9-yl]oxy]-4,5-dihydroxy-6-(hydroxymethyl)oxan-3-yl]oxy-6-(hydroxymethyl)oxane-3,4,5-triol