The molecule is a pentacyclic triterpenoid that is urs-12-ene substituted by hydroxy groups at positions 1, 2, 3 and 23 and a carboxy group at position 28 (the 1beta,2alpha,3alpha stereoisomer). Isolated from Weigela subsessilis, it exhibits anticomplement activity against complement induced hemolysis. It has a role as a metabolite. It is a pentacyclic triterpenoid, a monocarboxylic acid and a tetrol. It derives from a hydride of an ursane.
(1S,2R,4aS,6aS,6aS,6bR,8aR,9R,10S,11R,12S,12aR,14bS)-10,11,12-trihydroxy-9-(hydroxymethyl)-1,2,6a,6b,9,12a-hexamethyl-2,3,4,5,6,6a,7,8,8a,10,11,12,13,14b-tetradecahydro-1H-picene-4a-carboxylic acid