The molecule is a triterpenoid saponin that is composed of primulagenin A having a alpha-L-rhamnopyranosyl-(1->2)-beta-D-glucopyranosyl-(1->4)-[beta-D-glucopyranosyl-(1->2)]-alpha-L-arabinopyranosyl moiety attached to position 3 by a glycosidic linkage. It is isolated from the whole plants of Ardisia pusilla and exhibits cytotoxic activity against human gliboblastoma U251MG cells. It has a role as an antineoplastic agent and a plant metabolite. It is a tetrasaccharide derivative, a pentacyclic triterpenoid and a triterpenoid saponin. It derives from a primulagenin A.
(2S,3R,4R,5R,6S)-2-[(2S,3R,4S,5S,6R)-2-[(3S,4S,5R,6S)-6-[[(3S,4aR,6aR,6bS,8R,8aS,12aS,14aR,14bR)-8-hydroxy-8a-(hydroxymethyl)-4,4,6a,6b,11,11,14b-heptamethyl-1,2,3,4a,5,6,7,8,9,10,12,12a,14,14a-tetradecahydropicen-3-yl]oxy]-4-hydroxy-5-[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-3-yl]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-3-yl]oxy-6-methyloxane-3,4,5-triol