Androstanolone valerate (brand name Apeton), also known as stanolone valerate or dihydrotestosterone pentanoate, as well as 5ñ-androstan-17ò-3-one 17ò-valerate, is a synthetic androgen and anabolic steroid and a dihydrotestosterone ester. It is used as an injectable and acts as a prodrug of androstanolone (stanolone, dihydrotestosterone, DHT).