11-Deoxycortisol, also known as cortodoxone (INN) or cortexolone, as well as 17α,21-dihydroxyprogesterone or 17α,21-dihydroxypregn-4-ene-3,20-dione, is a glucocorticoid steroid hormone. It was first synthesized by Tadeusz Reichstein, and has also been referred to as Reichstein's Substance.