Estradiol distearate

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Estradiol distearate
Estradiol distearate.svg
Clinical data
Other namesEDS; Estradiol 3,17β-distearate; Estradiol dioctadecanoate; Estra-1,3,5(10)-triene-3,17β-diol 3,17β-dioctadecanoate
  • [(8R,9S,13S,14S,17S)-13-methyl-3-octadecanoyloxy-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthren-17-yl] octadecanoate
CAS Number
PubChem CID
Chemical and physical data
Molar mass805.326 g·mol−1
3D model (JSmol)
  • InChI=1S/C54H92O4/c1-4-6-8-10-12-14-16-18-20-22-24-26-28-30-32-34-52(55)57-46-37-39-47-45(44-46)36-38-49-48(47)42-43-54(3)50(49)40-41-51(54)58-53(56)35-33-31-29-27-25-23-21-19-17-15-13-11-9-7-5-2/h37,39,44,48-51H,4-36,38,40-43H2,1-3H3/t48-,49-,50+,51+,54+/m1/s1

Estradiol distearate (EDS), also known as estradiol dioctadecanoate, is an estrogen and an estrogen ester which was never marketed.[1][2] It is a long-acting prodrug of estradiol in the body.[2]

Structural properties of selected estradiol esters
Estrogen Structure Ester(s) Relative
mol. weight
E2 contentb
log Pc
Position(s) Moiet(ies) Type Lengtha
1.00 1.00 4.0
Estradiol acetate
Estradiol 3-acetate.svg
C3 Ethanoic acid Straight-chain fatty acid 2 1.15 0.87 4.2
Estradiol benzoate
Estradiol benzoate.svg
C3 Benzenecarboxylic acid Aromatic fatty acid – (~4–5) 1.38 0.72 4.7
Estradiol dipropionate
Estradiol dipropionate.svg
C3, C17β Propanoic acid (×2) Straight-chain fatty acid 3 (×2) 1.41 0.71 4.9
Estradiol valerate
Estradiol valerate.svg
C17β Pentanoic acid Straight-chain fatty acid 5 1.31 0.76 5.6–6.3
Estradiol benzoate butyrate
Estradiol butyrate benzoate.svg
C3, C17β Benzoic acid, butyric acid Mixed fatty acid – (~6, 2) 1.64 0.61 6.3
Estradiol cypionate
Estradiol 17 beta-cypionate.svg
C17β Cyclopentylpropanoic acid Aromatic fatty acid – (~6) 1.46 0.69 6.9
Estradiol enanthate
Estradiol enanthate.png
C17β Heptanoic acid Straight-chain fatty acid 7 1.41 0.71 6.7–7.3
Estradiol dienanthate
Estradiol dienanthate.svg
C3, C17β Heptanoic acid (×2) Straight-chain fatty acid 7 (×2) 1.82 0.55 8.1–10.4
Estradiol undecylate
Estradiol undecylate.svg
C17β Undecanoic acid Straight-chain fatty acid 11 1.62 0.62 9.2–9.8
Estradiol stearate
Estradiol stearate structure.svg
C17β Octadecanoic acid Straight-chain fatty acid 18 1.98 0.51 12.2–12.4
Estradiol distearate
Estradiol distearate.svg
C3, C17β Octadecanoic acid (×2) Straight-chain fatty acid 18 (×2) 2.96 0.34 20.2
Estradiol sulfate
Estradiol sulfate.svg
C3 Sulfuric acid Water-soluble conjugate 1.29 0.77 0.3–3.8
Estradiol glucuronide
Estradiol sulfate.svg
C17β Glucuronic acid Water-soluble conjugate 1.65 0.61 2.1–2.7
Estramustine phosphated
Estramustine phosphate.svg
C3, C17β Normustine, phosphoric acid Water-soluble conjugate 1.91 0.52 2.9–5.0
Polyestradiol phosphatee
Polyestradiol phosphate.svg
C3–C17β Phosphoric acid Water-soluble conjugate 1.23f 0.81f 2.9g
Footnotes: a = Length of ester in carbon atoms for straight-chain fatty acids or approximate length of ester in carbon atoms for aromatic fatty acids. b = Relative estradiol content by weight (i.e., relative estrogenic exposure). c = Experimental or predicted octanol/water partition coefficient (i.e., lipophilicity/hydrophobicity). Retrieved from PubChem, ChemSpider, and DrugBank. d = Also known as estradiol normustine phosphate. e = Polymer of estradiol phosphate (~13 repeat units). f = Relative molecular weight or estradiol content per repeat unit. g = log P of repeat unit (i.e., estradiol phosphate). Sources: See individual articles.

See also[edit]


  1. ^ Deb S, Wähälä K (October 2010). "Rapid synthesis of long chain fatty acid esters of steroids in ionic liquids with microwave irradiation: expedient one-pot procedure for estradiol monoesters". Steroids. 75 (10): 740–4. doi:10.1016/j.steroids.2010.03.005. PMID 20347856. S2CID 1695106.
  2. ^ a b Vazquez-Alcantara MA, Menjivar M, Garcia GA, Díaz-Zagoya JC, Garza-Flores J (December 1989). "Long-acting estrogenic responses of estradiol fatty acid esters". Journal of Steroid Biochemistry. 33 (6): 1111–8. doi:10.1016/0022-4731(89)90417-2. PMID 2515394.