has role has functional parent independent continuant 17beta-estradiol antidepressant hypoglycemic agent antineoplastic agent 3-hydroxy steroid 17-hydroxy steroid 17alpha-ethynylestradiol A 3-hydroxy steroid that is estradiol substituted by a ethynyl group at position 17. It is a xenoestrogen synthesized from estradiol and has been shown to exhibit high estrogenic potency on oral administration. CHEBI:4903 bone density conservation agent appetite enhancer anti-HIV agent anti-HBV agent terminal acetylenic compound anti-obesity agent xenoestrogen