Estradiol cyclooctyl acetate

Chemical compound Pharmaceutical compound

Estradiol cyclooctyl acetate
Clinical data

Other names	E₂COA; Estradiol cyclooctylacetate; Estradiol 17β-cyclooctylacetate; Estra-1,3,5(10)-triene-3,17β-diol 17β-cyclooctylacetate
Routes of administration	By mouth
Drug class	Estrogen; Estrogen ester
Identifiers
IUPAC name phenanthren-17-yl] 2-cyclooctylacetate
CAS Number	66791-46-6
PubChem CID	67083
ChemSpider	60433
CompTox Dashboard (EPA)	DTXSID10985354
Chemical and physical data
Formula	C₂₈H₄₀O₃
Molar mass	424.625 g·mol
3D model (JSmol)	Interactive image
SMILES C12CC3(1CC2OC(=O)CC4CCCCCCC4)CCC5=C3C=CC(=C5)O
InChI InChI=1S/C28H40O3/c1-28-16-15-23-22-12-10-21(29)18-20(22)9-11-24(23)25(28)13-14-26(28)31-27(30)17-19-7-5-3-2-4-6-8-19/h10,12,18-19,23-26,29H,2-9,11,13-17H2,1H3/t23-,24-,25+,26+,28+/m1/s1 Key:CZCGBAHDFURTGU-VMBLQBCYSA-N

Estradiol cyclooctyl acetate (E₂COA), or estradiol 17β-cyclooctylacetate, also known as estra-1,3,5(10)-triene-3,17β-diol 17β-cyclooctylacetate, is an estrogen medication and an estrogen ester – specifically, the 17β-cyclooctyl acetate ester of estradiol – which has been studied for use in hormone replacement therapy for ovariectomized women and as a hormonal contraceptive in combination with a progestin but was never marketed. It has greater oral bioavailability than does micronized estradiol due to absorption via the lymphatic system and hence partial bypassing of first-pass metabolism. It is approximately twice as potent as micronized estradiol orally and has a comparatively reduced impact on liver parameters such as changes in sex hormone-binding globulin production. It was investigated in combination with desogestrel as a birth control pill, but resulted in unacceptable menstrual bleeding patterns and was not further developed.

References

^ Bastianelli C, Farris M, Rosato E, Brosens I, Benagiano G (November 2018). "Pharmacodynamics of combined estrogen-progestin oral contraceptives 3. Inhibition of ovulation". Expert Review of Clinical Pharmacology. 11 (11): 1085–1098. doi:10.1080/17512433.2018.1536544. PMID 30325245. S2CID 53246678.
Dahlgren E, Crona N, Janson PO, Samsioe G (1985). "Oral replacement with estradiol-cyclooctyl acetate: a new estradiol analogue. Effects on serum lipids, proteins, gonadotrophins, estrogens and uterine endometrial morphology". Gynecologic and Obstetric Investigation. 20 (2): 84–90. doi:10.1159/000298978. PMID 3932144.
Schubert W, Cullberg G (1987). "Ovulation inhibition with 17 beta-estradiol cyclo-octyl acetate and desogestrel". Acta Obstetricia et Gynecologica Scandinavica. 66 (6): 543–547. doi:10.3109/00016348709015732. PMID 2962418. S2CID 73200770.
^ Schubert W, Cullberg G (1988). "Fat-soluble 17 beta-estradiol: a way of reducing dosage in steroid hormonal substitution?". Acta Obstetricia et Gynecologica Scandinavica. 67 (3): 271–275. doi:10.3109/00016348809004218. PMID 2972162. S2CID 39664429.

v t e Estradiol
Topics	Estradiol (as a hormone) Estradiol (as a medication) Pharmacodynamics of estradiol Pharmacokinetics of estradiol Estrogen (as a hormone) Estrogen (as a medication) Menopausal hormone therapy Feminizing hormone therapy Estradiol-containing birth control pill Combined injectable birth control High-dose estrogen Hydroxylation of estradiol
Esters	Estradiol acetate Estradiol acetylsalicylate Estradiol anthranilate Estradiol benzoate butyrate Estradiol benzoate cyclooctenyl ether Estradiol benzoate Estradiol butyrylacetate Estradiol cyclooctyl acetate Estradiol cypionate Estradiol decanoate Estradiol diacetate Estradiol dibutyrate Estradiol dienantate Estradiol dipropionate Estradiol distearate Estradiol disulfate Estradiol diundecylate Estradiol diundecylenate Estradiol enantate Estradiol furoate Estradiol glucuronide Estradiol hemisuccinate Estradiol hexahydrobenzoate Estradiol monopropionate Estradiol mustard Estradiol palmitate Estradiol phenylpropionate Estradiol phosphate Estradiol pivalate Estradiol propoxyphenylpropionate Estradiol salicylate Estradiol stearate Estradiol sulfamate Estradiol sulfate Estradiol undecylate Estradiol undecylenate Estradiol valerate Estramustine phosphate (estradiol normustine phosphate) Estrogen ester Polyestradiol phosphate
Related	Estrone Estriol Estetrol Ethinylestradiol Conjugated estrogens Esterified estrogens Estrone sulfate Estropipate (piperazine estrone sulfate)

ERTooltip Estrogen receptor

Agonists

Mixed
(SERMsTooltip Selective estrogen receptor modulators)

Antagonists

GPERTooltip G protein-coupled estrogen receptor

Agonists	2-Methoxyestradiol 7β-Hydroxyepiandrosterone Afimoxifene (4-hydroxytamoxifen) Aldosterone Atrazine Bisphenol A Daidzein DDT (p,p'-DDT, o',p'-DDE) Diarylpropionitrile Equol Estradiol Ethinylestradiol Fulvestrant (ICI-182780) G-1 Genistein GPER-L1 GPER-L2 Hydroxytyrosol Kepone Nicotinic acid Nicotinamide Nonylphenol Oleuropein PCBs (2,2',5'-PCB-4-OH) Propylpyrazoletriol Quercetin Raloxifene Resveratrol STX Tamoxifen Tectoridin
Antagonists	CCL18 Estriol G-15 G-36 MIBE
Unknown	Diethylstilbestrol Zearalenone

See also: Receptor/signaling modulators; Estrogens and antiestrogens; Androgen receptor modulators; Progesterone receptor modulators; List of estrogens

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