The molecule is a brassinosteroid that is 6-deoxocathasterone in which the hydroxy group at position 3 has been oxidised to the corresponding ketone. It is a brassinosteroid, a 22-hydroxy steroid and a 3-oxo-5alpha-steroid. It derives from a hydride of a campestane.
(5S,8R,9S,10S,13S,14S,17R)-17-[(2S,3S,5R)-3-hydroxy-5,6-dimethylheptan-2-yl]-10,13-dimethyl-1,2,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydrocyclopenta[a]phenanthren-3-one