The molecule is typhasterol in which the oxygen atom of the keto group has been substituted by two hydrogen atoms. A member of a biosynthetic pathway to castasterone, it has been isolated from the primary roots of maize. It is a sterol, a brassinosteroid, a 22-hydroxy steroid, a 23-hydroxy steroid and a 3alpha-hydroxy steroid. It derives from a typhasterol.
(2S,3R,4R,5S)-2-[(3R,5S,8R,9S,10S,13S,14S,17R)-3-hydroxy-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]-5,6-dimethylheptane-3,4-diol