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Anticonvulsant
Posovolone
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    Posovolone

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    Posovolone
    Posovolone.svg
    Clinical data
    Other names CO-134444; Co 134444; V-134444; 3β-Hydroxy-21-(1H-imidazol-1-yl)-3α-(methoxymethyl)-5α-pregnan-20-one
    Identifiers
    • 1-[(3R,5S,8R,9S,10S,13S,14S,17S)-3-hydroxy-3-(methoxymethyl)-10,13-dimethyl-1,2,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydrocyclopenta[a]phenanthren-17-yl]-2-imidazol-1-ylethanone
    CAS Number
    PubChem CID
    ChemSpider
    UNII
    Chemical and physical data
    Formula C26H40N2O3
    Molar mass 428.617 g·mol−1
    3D model (JSmol)
    • C[C@]12CC[C@@](C[C@@H]1CC[C@@H]3[C@@H]2CC[C@]4([C@H]3CC[C@@H]4C(=O)CN5C=CN=C5)C)(COC)O
    • InChI=1S/C26H40N2O3/c1-24-10-11-26(30,16-31-3)14-18(24)4-5-19-20-6-7-22(25(20,2)9-8-21(19)24)23(29)15-28-13-12-27-17-28/h12-13,17-22,30H,4-11,14-16H2,1-3H3/t18-,19-,20-,21-,22+,24-,25-,26+/m0/s1
    • Key:BRVGKZNQWCQKTC-MVCIVNJCSA-N

    Posovolone (developmental code name Co 134444) is a synthetic neurosteroid which was under development as a sedative/hypnotic medication for the treatment of insomnia. It is orally active and acts as a GABAA receptor positive allosteric modulator. In animals, posovolone shows anticonvulsant, anxiolytic-like, ataxic, and sleep-promoting effects and appeared to produce effects similar to those of pregnanolone. Development of the agent was started by 1999 and appears to have been discontinued by 2007. In 2021, an INN was registered for posovolone with the descriptor of "antidepressant". Posovolone was originally developed by Purdue Pharma.

    See also

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