Estradiol 3-saccharinylmethyl ether

Chemical compound Pharmaceutical compound

Estradiol 3-saccharinylmethyl ether
Clinical data

Other names	E2SME; 3-O-(Saccharinylmethyl)-17β-estradiol; 3-O-(Saccharinylmethyl)estra-1,3,5(10)-triene-3,17β-diol
Routes of administration	By mouth
Drug class	Estrogen
Identifiers
IUPAC name 2-phenanthren-3-yl]oxymethyl]-1,1-dioxo-1,2-benzothiazol-3-one
CAS Number	157231-19-1
PubChem CID	177989
ChemSpider	154944
UNII	AEF2Q624EL
CompTox Dashboard (EPA)	DTXSID40935645
Chemical and physical data
Formula	C₂₆H₂₉NO₅S
Molar mass	467.58 g·mol
3D model (JSmol)	Interactive image
SMILES C12CC3(1CC2O)CCC4=C3C=CC(=C4)OCN5C(=O)C6=CC=CC=C6S5(=O)=O
InChI InChI=1S/C26H29NO5S/c1-26-13-12-19-18-9-7-17(14-16(18)6-8-20(19)22(26)10-11-24(26)28)32-15-27-25(29)21-4-2-3-5-23(21)33(27,30)31/h2-5,7,9,14,19-20,22,24,28H,6,8,10-13,15H2,1H3/t19-,20-,22+,24+,26+/m1/s1 Key:QNUCLUWOICXPIY-QETBJLDASA-N

Estradiol 3-saccharinylmethyl ether (E2SME), also known as 3-O-(saccharinylmethyl)-17β-estradiol, is a synthetic estrogen and estrogen ether – specifically, the C3 saccharinyl methyl ether of estradiol – which was described in the mid-1990s and was never marketed. It is a prodrug of estradiol and appears to be partially protected from first-pass metabolism in the liver and intestines with oral administration, showing greatly improved oral potency compared to estradiol.

E2SME has been found to be 9-fold as potent as estradiol by the oral route in rats. Similarly, its bioavailability (16%) was 5-fold greater than that of estradiol via the oral route in rats, and the elimination half-life of released estradiol was 5- to 7-fold longer than that of regular estradiol. Conversely, when E2SME and estradiol were given intravenously in rats, there was no difference between them in terms of potency. In vitro studies revealed that E2SME is not hydrolyzed to estradiol enzymatically but rather is hydrolyzed chemically in biological media such as plasma, apparently dependent on the concentration of protein.

References

^ Patel J, Katovich MJ, Sloan KB, Curry SH, Prankerd RJ (February 1995). "A prodrug approach to increasing the oral potency of a phenolic drug. Part 2. Pharmacodynamics and preliminary bioavailability of an orally administered O-(imidomethyl) derivative of 17 beta-estradiol". Journal of Pharmaceutical Sciences. 84 (2): 174–178. doi:10.1002/jps.2600840210. PMID 7738796.
Patel JU, Prankerd RJ, Sloan KB (October 1994). "A prodrug approach to increasing the oral potency of a phenolic drug. 1. Synthesis, characterization, and stability of an O-(imidomethyl) derivative of 17 beta-estradiol". Journal of Pharmaceutical Sciences. 83 (10): 1477–1481. doi:10.1002/jps.2600831022. PMID 7884673.
^ Kuhnz W, Blode H, Zimmerman H (6 December 2012). "Pharmacokinetics of Exogenous Natural and Synthetic Estrogens and Antiestrogens". In Oettel M, Schillinger E (eds.). Estrogens and Antiestrogens II: Pharmacology and Clinical Application of Estrogens and Antiestrogen. Springer Science & Business Media. pp. 263–. ISBN 978-3-642-60107-1.
^ Aungst BJ, Matz N (2007). "Prodrugs to Reduce Presystemic Metabolism". Prodrugs. Biotechnology: Pharmaceutical Aspects. Vol. V. Springer. pp. 339–355. doi:10.1007/978-0-387-49785-3_8. ISBN 978-0-387-49782-2.

Estrogen receptor modulators

ERTooltip Estrogen receptor

Agonists

Unknown/unsorted: ERB-26
ERA-45
ERB-79
ZK-283197

Xenoestrogens: Anise-related (e.g., anethole, anol, dianethole, dianol, photoanethole)
Chalconoids (e.g., isoliquiritigenin, phloretin, phlorizin (phloridzin), wedelolactone)
Coumestans (e.g., coumestrol, psoralidin)
Flavonoids (incl. 7,8-DHF, 8-prenylnaringenin, apigenin, baicalein, baicalin, biochanin A, calycosin, catechin, daidzein, daidzin, ECG, EGCG, epicatechin, equol, formononetin, glabrene, glabridin, genistein, genistin, glycitein, kaempferol, liquiritigenin, mirificin, myricetin, naringenin, penduletin, pinocembrin, prunetin, puerarin, quercetin, tectoridin, tectorigenin)
Lavender oil
Lignans (e.g., enterodiol, enterolactone, nyasol (cis-hinokiresinol))
Metalloestrogens (e.g., cadmium)
Pesticides (e.g., alternariol, dieldrin, endosulfan, fenarimol, HPTE, methiocarb, methoxychlor, triclocarban, triclosan)
Phytosteroids (e.g., digitoxin (digitalis), diosgenin, guggulsterone)
Phytosterols (e.g., β-sitosterol, campesterol, stigmasterol)
Resorcylic acid lactones (e.g., zearalanone, α-zearalenol, β-zearalenol, zearalenone, zeranol (α-zearalanol), taleranol (teranol, β-zearalanol))
Steroid-like (e.g., deoxymiroestrol, miroestrol)
Stilbenoids (e.g., resveratrol, rhaponticin)
Synthetic xenoestrogens (e.g., alkylphenols, bisphenols (e.g., BPA, BPF, BPS), DDT, parabens, PBBs, PHBA, phthalates, PCBs)
Others (e.g., agnuside, rotundifuran)

Mixed
(SERMsTooltip Selective estrogen receptor modulators)

Antagonists

Coregulator-binding modulators: ERX-11

Noncompetitive inhibitors: Trilostane

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 Niacin Niacinamide 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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See also

References