Estradiol palmitate

Chemical compound

Pharmaceutical compound

Estradiol palmitate

Clinical data
Trade names| Esmopal
Other names| Estradiol monopalmitate; Estradiol hexadecanoate; Estradiol 17β-hexadecanoate
Drug class| Estrogen; Estrogen ester
Identifiers

IUPAC name

* [(8R,9S,13S,14S,17S)-3-Hydroxy-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthren-17-yl] hexadecanoate

CAS Number|

* 5776-45-4

PubChem CID|

* 111095

ChemSpider|

* 99723

UNII|

* 1Q5Y448XT0

CompTox Dashboard (EPA)|

* DTXSID00973346

ECHA InfoCard| 100.024.819
Chemical and physical data
Formula| C34H54O3
Molar mass| 510.803 g·mol−1
3D model (JSmol)|

* Interactive image

SMILES

* CCCCCCCCCCCCCCCC(=O)O[C@H]1CC[C@H]2[C@@H]3CCc4cc(O)ccc4[C@H]3CC[C@]12C

InChI

* InChI=1S/C34H54O3/c1-3-4-5-6-7-8-9-10-11-12-13-14-15-16-33(36)37-32-22-21-31-30-19-17-26-25-27(35)18-20-28(26)29(30)23-24-34(31,32)2/h18,20,25,29-32,35H,3-17,19,21-24H2,1-2H3/t29-,30-,31+,32+,34+/m1/s1

* Key:XQKLZLWOOGGXMV-KWXXMMNJSA-N

Estradiol palmitate (brand name Esmopal), or estradiol monopalmitate, also known as estradiol 17β-hexadecanoate, is a naturally occurring[1] steroidal estrogen and an estrogen ester – specifically, the C17β palmitate ester of estradiol.[2] It occurs in the body as a very long-lasting metabolite and prohormone of estradiol.[1] The compound has no affinity for the estrogen receptor, requiring transformation into estradiol for its estrogenic activity.[3] In addition to its endogenous role, estradiol palmitate was formerly used as a fattening agent in chickens under the brand name Esmopal.[4][5][6][7][8]

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Affinities and estrogenic potencies of estrogen esters and ethers at the estrogen receptors  Estrogen | Other names  | RBATooltip Relative binding affinity (%)a | REP (%)b

|
|
|

ER | ERα | ERβ
Estradiol | E2  | 100  | 100  | 100
Estradiol 3-sulfate | E2S; E2-3S  | ?  | 0.02  | 0.04
Estradiol 3-glucuronide | E2-3G  | ?  | 0.02  | 0.09
Estradiol 17β-glucuronide | E2-17G  | ?  | 0.002  | 0.0002
Estradiol benzoate | EB; Estradiol 3-benzoate  | 10  | 1.1  | 0.52
Estradiol 17β-acetate | E2-17A  | 31–45  | 24  | ?
Estradiol diacetate | EDA; Estradiol 3,17β-diacetate  | ?  | 0.79  | ?
Estradiol propionate | EP; Estradiol 17β-propionate  | 19–26  | 2.6  | ?
Estradiol valerate | EV; Estradiol 17β-valerate  | 2–11  | 0.04–21  | ?
Estradiol cypionate | EC; Estradiol 17β-cypionate  | ?c | 4.0  | ?
Estradiol palmitate  | Estradiol 17β-palmitate  | 0  | ?  | ?
Estradiol stearate | Estradiol 17β-stearate  | 0  | ?  | ?
Estrone | E1; 17-Ketoestradiol  | 11  | 5.3–38  | 14
Estrone sulfate | E1S; Estrone 3-sulfate  | 2  | 0.004  | 0.002
Estrone glucuronide | E1G; Estrone 3-glucuronide  | ?  | <0.001  | 0.0006
Ethinylestradiol | EE; 17α-Ethynylestradiol  | 100  | 17–150  | 129
Mestranol | EE 3-methyl ether  | 1  | 1.3–8.2  | 0.16
Quinestrol | EE 3-cyclopentyl ether  | ?  | 0.37  | ?
Footnotes: a = Relative binding affinities (RBAs) were determined via in-vitro displacement of labeled estradiol from estrogen receptors (ERs) generally of rodent uterine cytosol. Estrogen esters are variably hydrolyzed into estrogens in these systems (shorter ester chain length -> greater rate of hydrolysis) and the ER RBAs of the esters decrease strongly when hydrolysis is prevented. b = Relative estrogenic potencies (REPs) were calculated from half-maximal effective concentrations (EC50) that were determined via in-vitro β‐galactosidase (β-gal) and green fluorescent protein (GFP) production assays in yeast expressing human ERα and human ERβ. Both mammalian cells and yeast have the capacity to hydrolyze estrogen esters. c = The affinities of estradiol cypionate for the ERs are similar to those of estradiol valerate and estradiol benzoate (figure). Sources: See template page.

## See also

[edit]

* Estradiol stearate
* Estradiol undecylate
* List of estrogen esters § Estradiol esters

## References

[edit]

1. ^ a b Hochberg RB, Pahuja SL, Larner JM, Zielinski JE (1990). "Estradiol-fatty acid esters. Endogenous long-lived estrogens". Annals of the New York Academy of Sciences. 595 (1): 74–92\. Bibcode:1990NYASA.595...74H. doi:10.1111/j.1749-6632.1990.tb34284.x. PMID 2197972. S2CID 19866729.
2. ^ Elks J (14 November 2014). The Dictionary of Drugs: Chemical Data: Chemical Data, Structures and Bibliographies. Springer. p. 898\. ISBN 978-1-4757-2085-3.
3. ^ Janocko L, Larner JM, Hochberg RB (April 1984). "The interaction of C-17 esters of estradiol with the estrogen receptor". Endocrinology. 114 (4): 1180–1186\. doi:10.1210/endo-114-4-1180. PMID 6705734.
4. ^ Gerrits RJ (March 1970). "The Influence of Hormones on the Production of Meat". Sci Teacher. 37 (3): 31–34\. JSTOR 24151460.
5. ^ Gardiner EE, Newberry RC, Hunt JR (January 1988). "Effect of estradiol-17 beta-monopalmitate on the incidence of sudden death syndrome in male broiler chickens". Poultry Science. 67 (1): 156–157\. doi:10.3382/ps.0670156. PMID 3375173.
6. ^ Bassila MK, Adams RL, Pratt DE, Stadelman WJ (1975). "Effects of Sex, Strain and Estrogens on Quality of Chicken Roasters". Poultry Science. 54 (3): 696–702\. doi:10.3382/ps.0540696. ISSN 0032-5791.
7. ^ Moran ET, Etches RJ (June 1983). "Finishing broiler toms using an estradiol 17 beta implant together with a high energy-low protein final feed". Poultry Science. 62 (6): 1010–1020\. doi:10.3382/ps.0621010. PMID 6878131.
8. ^ Mickelberry WC (1968). "Influence of Dietary Fats and Estradiol 17 Beta Monopalmitate Upon the Edible Meat Yield of Roaster Chickens". Poultry Science. 47 (4): 1254–1257\. doi:10.3382/ps.0471254. ISSN 0032-5791.

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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)

* v
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* e

Estrogens and antiestrogens

Estrogens|

| ERTooltip Estrogen receptor agonists|

* Steroidal: Alfatradiol
* Certain androgens/anabolic steroids (e.g., testosterone, testosterone esters, methyltestosterone, metandienone, nandrolone esters) (via estrogenic metabolites)
* Certain progestins (e.g., norethisterone, noretynodrel, etynodiol diacetate, tibolone)
* Clomestrone
* Cloxestradiol acetate
* Conjugated estriol
* Conjugated estrogens
* Epiestriol
* Epimestrol
* Esterified estrogens
* Estetrol†
* Estradiol
* Estradiol esters (e.g., estradiol acetate, estradiol benzoate, estradiol cypionate, estradiol enanthate, estradiol undecylate, estradiol valerate, polyestradiol phosphate, estradiol ester mixtures (Climacteron))
* Estramustine phosphate
* Estriol
* Estriol esters (e.g., estriol succinate, polyestriol phosphate)
* Estrogenic substances
* Estrone
* Estrone esters
* Estrone sulfate
* Estropipate (piperazine estrone sulfate)
* Ethinylestradiol#
* Ethinylestradiol sulfonate
* Hydroxyestrone diacetate
* Mestranol
* Methylestradiol
* Moxestrol
* Nilestriol
* Prasterone (dehydroepiandrosterone; DHEA)
* Prasterone enanthate
* Prasterone sulfate
* Promestriene
* Quinestradol
* Quinestrol

* Nonsteroidal: Benzestrol
* Bifluranol
* Chlorotrianisene
* Dienestrol
* Dienestrol diacetate
* Diethylstilbestrol (stilbestrol)
* Diethylstilbestrol esters/ethers
* Dimestrol (diethylstilbestrol dimethyl ether)
* Fosfestrol (diethylstilbestrol diphosphate)
* Mestilbol (diethylstilbestrol monomethyl ether)
* Doisynoestrol (fenocycline)
* Hexestrol
* Hexestrol esters
* Methallenestril
* Methestrol (promethestrol)
* Methestrol dipropionate (promethestrol dipropionate)
* Paroxypropione
* Quadrosilan
* Triphenylbromoethylene
* Triphenylchloroethylene
* Zeranol

|

Progonadotropins|

* Antiandrogens (e.g., bicalutamide)
* GnRH agonists (e.g., GnRH (gonadorelin), leuprorelin)
* Gonadotropins (e.g., FSHTooltip follicle-stimulating hormone, LHTooltip luteinizing hormone)

Antiestrogens|

| ERTooltip Estrogen receptor antagonists
(incl. SERMsTooltip selective estrogen receptor modulators/SERDsTooltip selective estrogen receptor downregulators)|

* Acolbifene†
* Anordrin
* Bazedoxifene
* Broparestrol
* Clomifene#
* Cyclofenil
* Enclomifene†
* Epitiostanol
* Lasofoxifene
* Mepitiostane
* Ormeloxifene
* Ospemifene
* Raloxifene
* Tamoxifen#
* Toremifene

* Exclusively antagonistic: Elacestrant
* Fulvestrant

* Noncompetitive inhibitors: Trilostane

|

Aromatase inhibitors|

* First-generation: Aminoglutethimide
* Testolactone

* Second-generation: Fadrozole
* Formestane

* Third-generation: Anastrozole
* Exemestane
* Letrozole

Antigonadotropins|

* Androgens/anabolic steroids (e.g., testosterone, testosterone esters, nandrolone esters, oxandrolone, fluoxymesterone)
* D2 receptor antagonists (prolactin releasers) (e.g., domperidone, metoclopramide, risperidone, haloperidol, chlorpromazine, sulpiride)
* GnRH agonists (e.g., leuprorelin, goserelin)
* GnRH antagonists (e.g., cetrorelix, elagolix)
* Progestogens (e.g., chlormadinone acetate, cyproterone acetate, gestonorone caproate, hydroxyprogesterone caproate, medroxyprogesterone acetate, megestrol acetate)

Others|

* Mixed mechanism of action: Danazol
* Gestrinone

* Androstenedione immunogens: Androvax (androstenedione albumin)
* Ovandrotone albumin (Fecundin)

* #WHO-EM
* ‡Withdrawn from market
* Clinical trials:
* †Phase III
* §Never to phase III

See also
Estrogen receptor modulators
Androgens and antiandrogens
Progestogens and antiprogestogens
List of estrogens

* v
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* e

Estrogen receptor modulators

ERTooltip Estrogen receptor|

| 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-Fluoroestradiol
* 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)
* 11β-Chloromethylestradiol
* 11β-Methoxyestradiol
* 15α-Hydroxyestradiol
* 16-Ketoestradiol
* 16-Ketoestrone
* 16α-Fluoroestradiol
* 16α-Hydroxy-DHEA
* 16α-Hydroxyestrone
* 16α-Iodoestradiol
* 16α-LE2
* 16β-Hydroxyestrone
* 16β,17α-Epiestriol (16β-hydroxy-17α-estradiol)
* 17α-Estradiol (alfatradiol)
* 17α-Dihydroequilenin
* 17α-Dihydroequilin
* 17α-Epiestriol (16α-hydroxy-17α-estradiol)
* 17α-Ethynyl-3α-androstanediol
* 17α-Ethynyl-3β-androstanediol
* 17β-Dihydroequilenin
* 17β-Dihydroequilin
* 17β-Methyl-17α-dihydroequilenin
* 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
* ent-Estradiol
* 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
* Estrogenic substances
* Estromustine
* Estrone
* Estrone esters
* Estrone methyl ether
* Estropipate
* Etamestrol (eptamestrol)
* Ethinylandrostenediol
* Ethandrostate
* 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
* Butestrol
* Carbestrol
* D-15414
* DCW234
* Diarylpropionitrile
* Dienestrol
* Dienestrol diacetate
* Diethylstilbestrol
* Diethylstilbestrol esters
* Dimestrol (dianisylhexene)
* Dimethylstilbestrol
* Doisynoestrol (fenocycline)
* Doisynolic acid
* Efavirenz
* Elacestrant
* 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)
* M2613
* meso-Butestrol
* meso-Hexestrol
* Mestilbol
* Methallenestril
* Methestrol
* Methestrol dipropionate
* Paroxypropione
* Pentafluranol
* Phenestrol
* Prinaberel (ERB-041, WAY-202041)
* Propylpyrazoletriol
* Quadrosilan
* SC-3296
* 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, 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)|

* 2-Phenylbenzofuran
* 2-Phenyl-1-benzothiophene
* 4'-Hydroxynorendoxifen
* 27-Hydroxycholesterol
* Acefluranol
* Acolbifene
* Afimoxifene
* Anordiol
* Anordrin
* Arzoxifene
* Bazedoxifene
* Brilanestrant
* Broparestrol
* Camizestrant
* Chlorotrianisene
* Clomifene
* Clomifenoxide
* CN-55945-27
* Cyclofenil
* D-15413
* Desmethylchlorotrianisene
* Droloxifene
* 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
* MRL-37
* 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
* U-11555A
* U-11634
* Y-134
* Zindoxifene
* Zuclomifene

Antagonists|

* (R,R)-THC
* 7β-Hydroxy-DHEA
* Chloroindazole
* Cytestrol acetate
* EM-800 (SCH-57050)
* Epitiostanol
* ERA-90
* ERB-88
* Fulvestrant (ICI-182780)
* Glyceollins (I, II, III, IV)
* ICI-164384
* MDL-101906
* Mepitiostane
* Methylepitiostanol
* Methylpiperidinopyrazole
* MIBE
* Oxabicycloheptene sulfonate
* Phenytoin
* PHTPP
* Prochloraz
* RU-39411
* RU-58668
* SS1020
* TAS-108 (SR-16234)
* ZB716
* ZK-164015
* ZK-191703

* 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
* 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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|

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*[CID]: Compound ID
*[EPA]: U.S. Environmental Protection Agency
*[v]: View this template
*[t]: Discuss this template
*[e]: Edit this template
*[RBA]: Relative binding affinity
*[REP]: Relative estrogenic potency
*[ER]: Estrogen receptor
*[GnRH]: gonadotropin-releasing hormone
*[FSH]: follicle-stimulating hormone
*[LH]: luteinizing hormone
*[SERMs]: Selective estrogen receptor modulators
*[SERDs]: selective estrogen receptor downregulators
*[GPER]: G protein-coupled estrogen receptor