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| Other names | MDL-18962; Propargylestrenedione; PED; 10-(2-Propyn-1-yl)estr-4-ene-3,17-dione; 10-Propargylestr-4-ene-3,17-dione |
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| Formula | C21H26O2 |
| Molar mass | 310.437 g·mol−1 |
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Plomestane (INNTooltip International Nonproprietary Name,USANTooltip United States Adopted Name; former developmental code nameMDL-18962; also known aspropargylestrenedione,PED) is asteroidal,irreversiblearomatase inhibitor which was under development byMarion Merrell Dow/Hoechst Marion Russell (nowHoechst AG) as anantineoplastic agent for the treatment ofbreast cancer.[1][2][3][4][5] It was found to be effective inpreclinical studies and was also found to produce fewadverse effects in humanclinical trials, significantly reducingestrogen levels with a single administration.[5] However, development of the drug for clinical use was halted due to "technical issues" and it was never marketed.[6]
In addition to its activity as an aromatase inhibitor, plomestane has weakandrogenic properties.[5]
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