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CAS 57-63-6

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Ethinylestradiol

Description:
Ethinylestradiol is a synthetic estrogen, primarily used in hormonal contraceptives and hormone replacement therapy. It is characterized by its potent estrogenic activity, which is significantly stronger than that of natural estradiol. Ethinylestradiol is a white to off-white crystalline powder that is poorly soluble in water but soluble in organic solvents such as ethanol and acetone. Its chemical formula is C20H24O2, and it has a molecular weight of approximately 296.4 g/mol. The compound features an ethynyl group at the C17 position, which enhances its oral bioavailability and metabolic stability compared to natural estrogens. Ethinylestradiol acts by binding to estrogen receptors, influencing various physiological processes, including the regulation of the menstrual cycle and the development of secondary sexual characteristics. Due to its estrogenic effects, it can also have side effects, including an increased risk of thromboembolic events. As a widely used pharmaceutical agent, it is essential to consider its pharmacokinetics, potential interactions, and contraindications in clinical applications.
Formula:C20H24O2
InChI:InChI=1S/C20H24O2/c1-3-20(22)11-9-18-17-6-4-13-12-14(21)5-7-15(13)16(17)8-10-19(18,20)2/h1,5,7,12,16-18,21-22H,4,6,8-11H2,2H3/t16-,17-,18+,19+,20+/m1/s1
InChI key:InChIKey=BFPYWIDHMRZLRN-SLHNCBLASA-N
SMILES:C[C@@]12[C@]([C@]3([C@](CC1)(C=4C(CC3)=CC(O)=CC4)[H])[H])(CC[C@]2(C#C)O)[H]
Synonyms:
  • (17Alpha)-17-Ethynylestra-1,3,5(10)-Triene-3,17-Diol
  • (17Beta)-17-Ethynylestra-1,3,5(10)-Triene-3,17-Diol
  • (17α)-19-Norpregna-1,3,5(10)-trien-20-yne-3,17-diol
  • (8Alpha,13Alpha,17Beta)-17-Ethynylestra-1,3,5(10)-Triene-3,17-Diol
  • (8Xi,9Xi,14Xi,17Beta)-17-Ethynylestra-1,3,5(10)-Triene-3,17-Diol
  • 17-Ethinyl-3,17-estradiol
  • 17-Ethinylestradiol
  • 17-Ethynyl Estradiol
  • 17-Ethynyl-3,17-dihydroxy-1,3,5-oestratriene
  • 17-Ethynylestra-1,3,5(10)-Triene-3,17-Diol
  • See more synonyms
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