The molecule is a withanolide that is the 20-hydroxy derivative of tubocapsanolide A. Isolated from Tubocapsicum anomalum, it exhibits cytotoxic activity. It has a role as an antineoplastic agent. It is a delta-lactone, a 4-hydroxy steroid, an enone, an ergostanoid, a secondary alcohol, a tertiary alcohol, a withanolide, a 20-hydroxy steroid and an epoxy steroid. It derives from a tubocapsanolide A.
(1S,2R,6S,7R,9R,11S,12S,14R,16S,17S)-16-[(1S)-1-[(2R)-4,5-dimethyl-6-oxo-2,3-dihydropyran-2-yl]-1-hydroxyethyl]-6-hydroxy-2,17-dimethyl-8,15-dioxahexacyclo[9.8.0.02,7.07,9.012,17.014,16]nonadec-4-en-3-one