|Other names||Demethoxycarbestrol; NSC-86465; 2-methyl-3-ethyl-4-phenyl-δ4-cyclohexenecarboxylic acid|
|Chemical and physical data|
|Molar mass||244.3288 g/mol g·mol−1|
|3D model (JSmol)|
Fenestrel (INN, USAN) (developmental code name ORF-3858) is a synthetic, nonsteroidal estrogen that was developed as a postcoital contraceptive in the 1960s but was never marketed. Synthesized by Ortho Pharmaceutical in 1961 and studied extensively, it was coined the "morning-after-pill" or "postcoital antifertility agent". Fenestrel is a seco analogue of doisynolic acid, and a member of the cyclohexenecarboxylic acid series of estrogens.
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