Estriol dipropionate
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| Clinical data | |
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| Other names | Oestriol dipropionate; Estriol 3,17β-dipropionate; 16α-Hydroxyestra-1,3,5(10)-triene-3,17β-diyl dipropanoate |
| Routes of administration |
Intramuscular injection |
| Drug class | Estrogen; Estrogen ester |
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| Chemical and physical data | |
| Formula | C24H32O5 |
| Molar mass | 400.515 g·mol−1 |
| 3D model (JSmol) | |
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Estriol dipropionate, or estriol 3,17β-dipropionate, is a synthetic estrogen and estrogen ester – specifically, the C3 and C17β dipropionate ester of estriol – which was first described in 1963 and was never marketed. Following a single intramuscular injection of 6.94 mg estriol dipropionate (equivalent to 5.0 mg estriol) in an oil solution, peak levels of estriol occurred after 0.83 days, an elimination half-life of 12.7 hours was observed, and estriol levels remained elevated for up to 4 days. For comparison, the duration of estriol was much shorter, while that of estriol dihexanoate was much longer.