The molecule is a withanolide that is withaferin A substituted by a hydroxy group at position 11. Isolated from Physalis longifolia, it exhibits antineoplastic activity. It has a role as a metabolite, an antineoplastic agent and a plant metabolite. It is a delta-lactone, a 27-hydroxy steroid, a 4-hydroxy steroid, an 11beta-hydroxy steroid, an enone, an ergostanoid, a primary alcohol, a secondary alcohol, a withanolide and an epoxy steroid. It derives from a withaferin A.
(1S,2R,6S,7R,9R,11S,12S,15R,16S,18S)-6,18-dihydroxy-15-[(1S)-1-[(2R)-5-(hydroxymethyl)-4-methyl-6-oxo-2,3-dihydropyran-2-yl]ethyl]-2,16-dimethyl-8-oxapentacyclo[9.7.0.02,7.07,9.012,16]octadec-4-en-3-one