16-Ketoestrone

Names
IUPAC name

3-Hydroxyestra-1,3,5(10)-triene-16,17-dione

Systematic IUPAC name

(3aS,3bR,9bS,11aS)-7-Hydroxy-11a-methyl-3a,3b,4,5,9b,10,11,11a-octahydro-1H-cyclopenta[a]phenanthrene-1,2(3H)-dione

Other names

16-Oxoestrone; 16-Keto-E1; 16-Oxo-E1; NSC-60462

Identifiers

CAS Number

* 1228-73-5

3D model (JSmol)

* Interactive image

ChEBI |

* CHEBI:34166

ChemSpider |

* 216072

KEGG |

* C14441

PubChem CID

* 246876

UNII |

* 113V416QTU

InChI

* InChI=1S/C18H20O3/c1-18-7-6-13-12-5-3-11(19)8-10(12)2-4-14(13)15(18)9-16(20)17(18)21/h3,5,8,13-15,19H,2,4,6-7,9H2,1H3/t13-,14-,15+,18+/m1/s1

Key: ANPHVANSJXDRTP-BSXFFOKHSA-N

SMILES

* C[C@]12CC[C@H]3[C@H]([C@@H]1CC(=O)C2=O)CCC4=C3C=CC(=C4)O

Properties

Chemical formula

| C18H20O3
Molar mass | 284.355 g·mol−1

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Infobox references

Tracking categories (test):

* SizeSet

16-Ketoestrone (16-keto-E1, or 16-oxoestrone, or 16-oxo-E1) is an endogenous estrogen related to 16α-hydroxyestrone and 16β-hydroxyestrone.[1][2][3] In contrast to 16α-hydroxyestrone and 16β-hydroxyestrone, but similarly to 16-ketoestradiol, 16-ketoestrone is a very weak estrogen with less than 1/1000 the estrogenic potency of estrone in the uterus.[3] 16-Ketoestrone has been reported to act as an inhibitor of 17β-hydroxysteroid dehydrogenases.[4] 16-Ketoestrone can be converted by 16α-hydroxysteroid dehydrogenase into estriol in the body.[1][5]

## References

1. ↑ 1.0 1.1 Breuer, Heinz (1962). "The Metabolism of the Natural Estrogens". Vitamins & Hormones 20: 285–335. doi:10.1016/S0083-6729(08)60720-7. ISBN 9780127098203. ISSN 0083-6729.
2. ↑ "16-Substituted steroids; 16-keto-alpha-estradiol and 16-ketoestrone". J. Biol. Chem. 172 (1): 325–32. January 1948. doi:10.1016/S0021-9258(18)35637-0. PMID 18920793. https://www.jbc.org/content/172/1/325.short.
3. ↑ 3.0 3.1 "The depression of estrone-induced uterine growth by phenolic estrogens with oxygenated functions at positions 6 or 16: the impeded estrogens". J. Exp. Med. 102 (3): 335–46. September 1955. doi:10.1084/jem.102.3.335. PMID 13252187.
4. ↑ "Affinity labeling of arginyl residues at the catalytic region of estradiol 17 beta-dehydrogenase from human placenta by 16-oxoestrone". Eur. J. Biochem. 129 (3): 691–5. January 1983. doi:10.1111/j.1432-1033.1983.tb07104.x. PMID 6572146.
5. ↑ "The metabolism of 16-ketoestrone and 16-keto-estradiol in man". J. Biol. Chem. 184 (2): 677–85. June 1950. doi:10.1016/S0021-9258(19)51001-8. PMID 15428451.

* v
* t
* e

Endogenous steroids

Precursors|

* Cholesterol
* 22R-Hydroxycholesterol
* 20α,22R-Dihydroxycholesterol
* Pregnenolone
* 11β-Hydroxypregnenolone
* 17α-Hydroxypregnenolone
* 21-Hydroxypregnenolone
* 17α,21-Dihydroxypregnenolone
* 11β,17α,21-Trihydroxypregnenolone

Corticosteroids|

| Glucocorticoids|

* 3α,5α-Tetrahydrocorticosterone
* 5α-Dihydrocorticosterone
* 11-Deoxycorticosterone
* 11-Deoxycortisol
* 11-Ketoprogesterone
* 21-Deoxycortisol
* 21-Deoxycortisone
* Corticosterone
* Cortisol
* Cortisone
* 17α-Hydroxypregnenolone
* 17α-Hydroxyprogesterone
* Pregnenolone
* Progesterone

* Metabolites: 5α-Dihydrocortisol
* 3α,5α-Tetrahydrocortisol

|

Mineralocorticoids|

* 5α-Dihydroaldosterone
* 11-Dehydrocorticosterone (11-oxocorticosterone, 17-deoxycortisone)
* 11-Deoxycortisol
* 11-Deoxycorticosterone
* 11β-Hydroxyprogesterone (21-deoxycorticosterone)
* 18-Hydroxy-11-deoxycorticosterone
* 18-Hydroxycorticosterone
* 18-Hydroxyprogesterone
* Aldosterone
* Corticosterone
* Cortisol

Sex steroids|

| Androgens|

* 11-Ketodihydrotestosterone
* 11-Ketotestosterone
* 7β-Hydroxyepiandrosterone
* 11β-Hydroxyandrostenedione
* Adrenosterone (11-ketoandrostenedione)
* Androstenediol
* Androstenedione
* Androsterone
* Dehydroandrosterone
* DHEA
* DHEA sulfate
* Dihydrotestosterone
* Epiandrosterone
* Epitestosterone
* 16α-Hydroxyandrostenedione
* 16α-Hydroxy-DHEA
* 16α-Hydroxy-DHEA sulfate
* Testosterone

* Metabolites: 3α-Androstanediol
* 3α-Androstanediol glucuronide
* 3β-Androstanediol
* 5β-Dihydrotestosterone
* 3α-Etiocholanediol
* 3β-Etiocholanediol
* Androstanetriols
* Androstenediol sulfate
* Androsterone glucuronide
* Androsterone sulfate
* Dihydrotestosterone glucuronide
* Dihydrotestosterone sulfate
* Etiocholanedione
* Etiocholanolone
* Etiocholanolone glucuronide
* Epietiocholanolone
* Testosterone glucuronide
* Testosterone sulfate

|

Estrogens|

* Estranes: Estetrol
* Estradiol
* Estrone
* Estriol
* 17α-Estradiol
* 16β-Epiestriol (16β-hydroxyestradiol)
* 17α-Epiestriol (16α-hydroxy-17α-estradiol)
* 16β,17α-Epiestriol (16β-hydroxy-17α-estradiol)
* 2-Hydroxyestradiol
* 2-Hydroxyestriol
* 2-Hydroxyestrone
* 4-Hydroxyestradiol
* 4-Hydroxyestriol
* 4-Hydroxyestrone
* 4-Methoxyestradiol
* 16α-Hydroxyestrone

* Others: 27-Hydroxycholesterol
* 3α-Androstanediol
* 3β-Androstanediol
* 4-Androstenedione
* 5-Androstenediol
* DHEA
* DHEA sulfate
* 7-Keto-DHEA
* 7α-Hydroxy-DHEA
* 16α-Hydroxy-DHEA

* Metabolites: 2-Methoxyestradiol
* 2-Methoxyestrone
* 4-Methoxyestrone
* Estradiol glucuronide
* Estradiol 3-glucuronide
* Estradiol sulfate
* Estradiol 17β-sulfate
* Estrone glucuronide
* Estrone sulfate
* Estriol glucuronide
* Estriol sulfate
* Lipoidal estradiol (e.g., estradiol stearate, estradiol palmitate)

Progestogens|

* Progesterone
* 16α-Hydroxyprogesterone
* 17α-Hydroxyprogesterone
* 20α-Dihydroprogesterone
* 20β-Dihydroprogesterone
* 5α-Dihydroprogesterone
* 11-Deoxycorticosterone
* 5α-DHDOC

* Metabolites: Allopregnanediol
* Pregnanediol
* Pregnanediol glucuronide
* Pregnanetriol

Neurosteroids|

* Cholestanes: 24S-Hydroxycholesterol
* Cholesterol

* Pregnanes: 3α-Dihydroprogesterone
* 3β-Dihydroprogesterone
* 5α-Dihydrocorticosterone
* 5α-Dihydroprogesterone
* 5β-Dihydroprogesterone
* Allopregnanolone
* Corticosterone
* DHC
* DHDOC
* 11-Deoxycorticosterone
* Epipregnanolone
* Isopregnanolone
* Pregnanolone
* Pregnenolone
* Pregnenolone sulfate
* Progesterone
* THB
* THDOC

* Androstanes: 3α-Androstanediol
* 3α-Androstenol
* 7-Keto-DHEA
* 7α-Hydroxy-DHEA
* 7β-Hydroxy-DHEA
* 7α-Hydroxyepiandrosterone
* 7β-Hydroxyepiandrosterone
* Androsterone
* DHEA
* DHEA sulfate
* Etiocholanolone

* Pheromones: 3α-Androstenol
* 3β-Androstenol
* Androstadienol
* Androstadienone
* Androstenone
* Androsterone
* Estratetraenol

Others|

* Vitamin D: 7-Dehydrocholesterol
* Calcidiol/Calcifediol
* Calcitriol
* Cholecalciferol

* Others: 7α-Hydroxycholesterol
* 11α-Hydroxyprogesterone
* 11β-Hydroxyprogesterone
* Cholesterol sulfate

* v
* t
* e

Estrogen receptor modulators

ER|

| Agonists|

* Steroidal: 2-Hydroxyestradiol
* 2-Hydroxyestrone
* 3-Methyl-19-methyleneandrosta-3,5-dien-17β-ol
* 3α-Androstanediol
* 3α,5α-Dihydrolevonorgestrel
* 3β,5α-Dihydrolevonorgestrel
* 3α-Hydroxytibolone
* 3β-Hydroxytibolone
* 3β-Androstanediol
* 4-Androstenediol
* 4-Androstenedione
* 4-Hydroxyestradiol
* 4-Hydroxyestrone
* 4-Methoxyestradiol
* 4-Methoxyestrone
* 5-Androstenediol
* 7-Oxo-DHEA
* 7α-Hydroxy-DHEA
* 7α-Methylestradiol
* 7β-Hydroxyepiandrosterone
* 8,9-Dehydroestradiol
* 8,9-Dehydroestrone
* 8β-VE2
* 10β,17β-Dihydroxyestra-1,4-dien-3-one (DHED)
* 16α-Fluoroestradiol
* 16α-Hydroxy-DHEA
* 16α-Hydroxyestrone
* 16α-Iodoestradiol
* 16α-LE2
* 16β,17α-Epiestriol (16β-hydroxy-17α-estradiol)
* 17α-Estradiol (alfatradiol)
* 17α-Dihydroequilenin
* 17α-Dihydroequilin
* 17α-Epiestriol (16α-hydroxy-17α-estradiol)
* 17β-Dihydroequilenin
* 17β-Dihydroequilin
* Abiraterone
* Abiraterone acetate
* Alestramustine
* Almestrone
* Anabolic steroids (e.g., testosterone and esters, methyltestosterone, metandienone (methandrostenolone), nandrolone and esters, many others; via estrogenic metabolites)
* Atrimustine
* Bolandiol
* Bolandiol dipropionate
* Butolame
* Clomestrone
* Cloxestradiol
* Cloxestradiol acetate
* Conjugated estriol
* Conjugated estrogens
* Cyclodiol
* Cyclotriol
* DHEA
* DHEA-S
* Epiestriol (16β-epiestriol, 16β-hydroxy-17β-estradiol)
* Epimestrol
* Equilenin
* Equilin
* ERA-63 (ORG-37663)
* Esterified estrogens
* Estetrol
* Estradiol
* Estradiol esters
* Lipoidal estradiol
* Polyestradiol phosphate
* Estramustine
* Estramustine phosphate
* Estrapronicate
* Estrazinol
* Estriol
* Estriol esters
* Polyestriol phosphate
* Estrofurate
* Estromustine
* Estrone
* Estrone esters
* Estrone methyl ether
* Estropipate
* Etamestrol (eptamestrol)
* Ethinylestradiol
* Ethinylestradiol 3-benzoate
* Ethinylestradiol sulfonate
* Ethinylestriol
* Ethylestradiol
* Etynodiol
* Etynodiol diacetate
* Hexolame
* Hippulin
* Hydroxyestrone diacetate
* Lynestrenol
* Lynestrenol phenylpropionate
* Mestranol
* Methylestradiol
* Moxestrol
* Mytatrienediol
* Nilestriol
* Norethisterone
* Noretynodrel
* Orestrate
* Pentolame
* Prodiame
* Prolame
* Promestriene
* RU-16117
* Quinestradol
* Quinestrol
* Tibolone

* Nonsteroidal: (R,R)-THC
* (S,S)-THC
* 2,8-DHHHC
* β-LGND1
* β-LGND2 (GTx-878)
* AC-186
* Allenestrol
* Allenolic acid
* Benzestrol
* Bifluranol
* Bisdehydrodoisynolic acid
* Carbestrol
* D-15414
* DCW234
* Diarylpropionitrile
* Dienestrol
* Dienestrol diacetate
* Diethylstilbestrol
* Diethylstilbestrol esters
* Dimestrol (dianisylhexene)
* Doisynoestrol (fenocycline)
* Doisynolic acid
* Efavirenz
* ERB-196 (WAY-202196)
* Erteberel (SERBA-1, LY-500307)
* Estrobin (DBE)
* Fenestrel
* FERb 033
* Fosfestrol (diethylstilbestrol diphosphate)
* Furostilbestrol (diethylstilbestrol difuroate)
* GTx-758
* Hexestrol
* Hexestrol esters
* ICI-85966 (Stilbostat)
* Mestilbol
* Methallenestril
* Methestrol
* Methestrol dipropionate
* Paroxypropione
* Pentafluranol
* Phenestrol
* Prinaberel (ERB-041, WAY-202041)
* Propylpyrazoletriol
* Quadrosilan
* SC-4289
* SERBA-2
* SKF-82,958
* Terfluranol
* Triphenylbromoethylene
* Triphenylchloroethylene
* Triphenyliodoethylene
* Triphenylmethylethylene (triphenylpropene)
* WAY-166818
* WAY-169916
* WAY-200070
* WAY-204688 (SIM-688)
* WAY-214156

* 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, [[Chemistry:Epicateepicatechin, Chemistry:Equol|equol]], formononetin, glabrene, glabridin, Genistein|genistein]], genistin, glycitein, kaempferol, Chemistry:Liquiritigenin

|

Mixed
(SERMs)|

* 2-Phenylbenzofuran
* 2-Phenylbenzothiophene
* 4'-Hydroxynorendoxifen
* 27-Hydroxycholesterol
* Acefluranol
* Acolbifene
* Afimoxifene
* Anordiol
* Anordrin
* Arzoxifene
* Bazedoxifene
* Brilanestrant
* Broparestrol
* Chlorotrianisene
* Clomifene
* Clomifenoxide
* Cyclofenil
* D-15413
* Droloxifene
* Elacestrant
* Enclomifene
* Endoxifen
* Etacstil (GW-5638, DPC-974)
* Ethamoxytriphetol (MER-25)
* Femarelle
* Fispemifene
* GW-7604
* ICI-55548
* Idoxifene
* Lasofoxifene
* Levormeloxifene
* LN-1643
* LN-2299
* LY-117018
* Menerba
* Miproxifene
* Miproxifene phosphate
* Nafoxidine
* Nitromifene
* NNC 45-0095
* NNC 45-0320
* NNC 45-0781
* NNC 45-1506
* Ormeloxifene
* Ospemifene
* Panomifene
* Pipendoxifene
* Promensil
* Raloxifene
* Rimostil (P-081)
* Spironolactone
* SS1010
* Tamoxifen
* TAS-108 (SR-16234)
* Toremifene
* Trioxifene
* TZE-5323
* Y-134
* Zindoxifene
* Zuclomifene

Antagonists|

* (R,R)-THC
* 7β-Hydroxy-DHEA
* Chloroindazole
* Cytestrol acetate
* EM-800
* Epitiostanol
* ERA-90
* ERB-88
* Fulvestrant (ICI-182780)
* Glyceollins (I, II, III, IV)
* ICI-164384
* Mepitiostane
* Methylepitiostanol
* Methylpiperidinopyrazole
* MIBE
* Oxabicycloheptene sulfonate
* Phenytoin
* PHTPP
* Prochloraz
* RU-58668
* SS1020
* TAS-108 (SR-16234)
* ZB716
* ZK-164015
* ZK-191703

* Coregulator-binding modulators: ERX-11

GPER|

| Agonists|

* 2-Methoxyestradiol
* 7β-Hydroxyepiandrosterone
* Afimoxifene (4-hydroxytamoxifen)
* Atrazine
* Bisphenol A
* Daidzein
* DDT (p,p'-DDT, o',p'-DDE)
* Equol
* Estradiol
* Ethinylestradiol
* Fulvestrant (ICI-182780)
* G-1
* Genistein
* GPER-L1
* GPER-L2
* Hydroxytyrosol
* Kepone
* Niacin
* Nicotinamide
* Nonylphenol
* Oleuropein
* PCBs (2,2',5'-PCB-4-OH)
* Propylpyrazoletriol
* Quercetin
* Raloxifene
* Resveratrol
* Tamoxifen
* Tectoridin
* Zearalanone
* Zearalenol
* Zearalenone
* Zeranol (zearalanol))

|

Antagonists|

* CCL18
* Estriol
* G-15
* G-36
* MIBE

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

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*[CID]: Compound ID
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*[ER]: Estrogen receptor
*[SERMs]: Selective estrogen receptor modulators
*[GPER]: G protein-coupled estrogen receptor