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Abandoned drugs
Estradiol mustard
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    Estradiol mustard

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    Estradiol mustard
    Estradiol mustard.svg
    Clinical data
    Other names NSC-112259; Chlorphenacyl estradiol diester; Estradiol 3,17β-bis(4-(bis(2-chloroethyl)amino)phenyl)acetate
    Drug class Chemotherapeutic agent; Estrogen; Estrogen ester
    Identifiers
    • [(8R,9S,13S,14S,17S)-3-[2-[4-[Bis(2-chloroethyl)amino]phenyl]acetyl]oxy-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthren-17-yl] 2-[4-[bis(2-chloroethyl)amino]phenyl]acetate
    CAS Number
    PubChem CID
    ChemSpider
    UNII
    ChEBI
    ChEMBL
    CompTox Dashboard (EPA)
    Chemical and physical data
    Formula C42H50Cl4N2O4
    Molar mass 788.67 g·mol−1
    3D model (JSmol)
    • C[C@]12CC[C@H]3[C@H]([C@@H]1CC[C@@H]2OC(=O)CC4=CC=C(C=C4)N(CCCl)CCCl)CCC5=C3C=CC(=C5)OC(=O)CC6=CC=C(C=C6)N(CCCl)CCCl
    • InChI=1S/C42H50Cl4N2O4/c1-42-17-16-36-35-13-11-34(51-40(49)26-29-2-7-32(8-3-29)47(22-18-43)23-19-44)28-31(35)6-12-37(36)38(42)14-15-39(42)52-41(50)27-30-4-9-33(10-5-30)48(24-20-45)25-21-46/h2-5,7-11,13,28,36-39H,6,12,14-27H2,1H3/t36-,37-,38+,39+,42+/m1/s1
    • Key:LRSFXIJGHRPOQQ-VZRQQIPSSA-N

    Estradiol mustard, also known as chlorphenacyl estradiol diester, as well as estradiol 3,17β-bis(4-(bis(2-chloroethyl)amino)phenyl)acetate, is a synthetic, steroidal estrogen and cytostatic antineoplastic agent and a chlorphenacyl nitrogen mustard-coupled estrogen ester that was never marketed. It is selectively distributed into estrogen receptor (ER)-positive tissues such as ER-expressing tumors like those seen in breast and prostate cancers. For this reason, estradiol mustard and other cytostatic-linked estrogens like estramustine phosphate have reduced toxicity relative to non-linked nitrogen mustard cytostatic antineoplastic agents. However, they may stimulate breast tumor growth due to their inherent estrogenic activity and are said to be devoid of major therapeutic efficacy in breast cancer, although estramustine phosphate has been approved for and is used (almost exclusively) in the treatment of prostate cancer.

    See also



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