Cortodoxone-d7 (11-Deoxycortisol-d7) is a deuterium labeled Cortodoxone (HY-77839). Cortodoxone (11-Deoxycortisol, cortexolone) is a glucocorticoid steroid hormone and also is a glucocorticoid antagonist. Cortodoxone increases tryptophan oxygenase (TO) activity and induces the secretion of corticosterone. Cortodoxone regulates T cell proliferation and activation[1][2].