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| Other names | 11β-CME2; CME; ORG-4333; 11β-(Chloromethyl)estra-1,3,5(10)-trien-3,17β-diol |
| Drug class | Estrogen |
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| Formula | C19H25ClO2 |
| Molar mass | 320.86 g·mol−1 |
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11β-Chloromethylestradiol (11β-CME2; developmental code nameORG-4333) is asyntheticsteroidalestrogen which was never marketed.[1][2][3][4][5][6] It has very highaffinity for theestrogen receptor and dissociates from it relatively slowly.[1][2][4][5][7][8] It was originally thought that 11β-CME2 might be a covalent ligand of the estrogen receptors, but its binding was subsequently shown to be fully reversible.[3] Therelative binding affinity of 11β-CME2 for theestrogen receptors ranges from 230 to 3,320% of that ofestradiol depending on the study.[5][9][7][8][10][11] 11β-CME2 also has about 14% of the relative binding affinity of estradiol forsex hormone-binding globulin (SHBG).[11] The compound has been developed as aradiolabel for the ERs.[3][4]
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