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Abandoned drugs
Nandrolone cyclotate
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    Nandrolone cyclotate

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    Nandrolone cyclotate
    Nandrolone cyclotate.svg
    Clinical data
    Other names Nandrolone ciclotate; RS-3268R; 19-Nortestosterone 17β-ciclotate
    Routes of
    administration    		 Intramuscular injection
    Drug class Androgen; Anabolic steroid; Androgen ester; Progestogen
    Identifiers
    • [(8R,9S,10R,13S,14S,17S)-13-methyl-3-oxo-2,6,7,8,9,10,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl] 1-methylbicyclo[2.2.2]oct-2-ene-4-carboxylate
    CAS Number
    PubChem CID
    ChemSpider
    UNII
    CompTox Dashboard (EPA)
    Chemical and physical data
    Formula C28H38O3
    Molar mass 422.609 g·mol−1
    3D model (JSmol)
    • C[C@@]12C=C[C@@](CC1)(CC2)C(=O)O[C@@H]3[C@@]4([C@H]([C@H]5[C@@H]([C@@H]6C(=CC(=O)CC6)CC5)CC4)CC3)C
    • InChI=1S/C28H38O3/c1-26-11-14-28(15-12-26,16-13-26)25(30)31-24-8-7-23-22-5-3-18-17-19(29)4-6-20(18)21(22)9-10-27(23,24)2/h11,14,17,20-24H,3-10,12-13,15-16H2,1-2H3/t20-,21+,22+,23-,24-,26-,27-,28-/m0/s1
    • Key:REACBNMPQDINOF-ZDMPKJLCSA-N

    Nandrolone cyclotate (USAN) (developmental code name RS-3268R), or nandrolone ciclotate, also known as 19-nortestosterone 17β-ciclotate, is a synthetic and injected anabolic–androgenic steroid (AAS) of the nandrolone (19-nortestosterone) group which was never marketed. It is an androgen ester – specifically, the C17β ciclotate (4-methylbicyclo[2.2.2]oct-2-ene-1-carboxylate) ester of nandrolone. Nandrolone cyclotate has potent and prolonged activity as an AAS when administered by intramuscular injection and is reported to have a similar duration of action to that of nandrolone decanoate via this route.

    Relative affinities (%) of nandrolone and related steroids
    Compound PR AR ER GR MR SHBG CBG
    Nandrolone 20 154–155 <0.1 0.5 1.6 1–16 0.1
    Testosterone 1.0–1.2 100 <0.1 0.17 0.9 19–82 3–8
    Estradiol 2.6 7.9 100 0.6 0.13 8.7–12 <0.1
    Notes: Values are percentages (%). Reference ligands (100%) were progesterone for the PR, testosterone for the AR, estradiol for the ER, dexamethasone for the GR, aldosterone for the MR, dihydrotestosterone for SHBG, and cortisol for CBG. Sources: See template.

    See also


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