Nandrolone
They are synthetic androgens and anabolic steroids and hence are agonists of the androgen receptor ( AR ) , the biological target of androgens like testosterone and dihydrotestosterone ( DHT ) . 
<triplet> androgen receptor <subj> dihydrotestosterone <obj> physically interacts with <triplet> dihydrotestosterone <subj> androgen receptor <obj> physically interacts with