TESTOSTERONE (3,4-13C2)

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Labelled Testosterone (T155000). Principal hormone of the testes, produced by the interstitial cells. Major circulating androgen; converted by 5α-reductase in androgen-dependent target tissues to 5α-d ehydrotestosterone which is required for normal male sexual differentiation. Also converted by aromatization to Estradiol. Controlled substance (anabolic steroid). Androgen.