The molecule is a brassinosteroid that is castasterone carrying an additional hydroxy substituent at position 26. It has a role as a plant metabolite. It is a brassinosteroid, a 22-hydroxy steroid, a 23-hydroxy steroid, a 2alpha-hydroxy steroid, a 3alpha-hydroxy steroid, a 6-oxo steroid and a 26-hydroxy steroid. It derives from a castasterone.
(2R,3S,5S,8S,9S,10R,13S,14S,17R)-2,3-dihydroxy-10,13-dimethyl-17-[(2S,3R,4R,5S)-3,4,7-trihydroxy-5,6-dimethylheptan-2-yl]-1,2,3,4,5,7,8,9,11,12,14,15,16,17-tetradecahydrocyclopenta[a]phenanthren-6-one