Estradiol palmitate - Misplaced Pages

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 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
3D model (JSmol)	Interactive image
SMILES CCCCCCCCCCCCCCCC(=O)O1CC23CCc4cc(O)ccc43CC12C
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 steroidal estrogen and an estrogen ester – specifically, the C17β palmitate ester of estradiol. It occurs in the body as a very long-lasting metabolite and prohormone of estradiol. The compound has no affinity for the estrogen receptor, requiring transformation into estradiol for its estrogenic activity. In addition to its endogenous role, estradiol palmitate was formerly used as a fattening agent in chickens under the brand name Esmopal.

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Affinities and estrogenic potencies of estrogen esters and ethers at the estrogen receptors
Estrogen	Other names	RBATooltip Relative binding affinity (%)	REP (%)
Estrogen	Other names	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	?	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: = 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. = 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. = The affinities of estradiol cypionate for the ERs are similar to those of estradiol valerate and estradiol benzoate (figure). Sources: See template page.

References

^ 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.
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.
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.
Gerrits RJ (March 1970). "The Influence of Hormones on the Production of Meat". Sci Teacher. 37 (3): 31–34. JSTOR 24151460.
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.
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.
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.
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.

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)

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

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

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 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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References