<prompt> All are anti-androgens exceptFinasterideFlutamideCyproterone acetateDihydrotestosteron  <response>: Testosterone which is a natural androgen is conveed to more active dihydrotestosterone by the enzyme steroid 5alpha-reductase. All others are anti-androgens. Flutamide, nilutamide, bicalutamide are androgen receptor antagonists Ref.Essential s of medical pharmacology TD Tripathi 7th edition page no.296 