Estradiol undecylenate

Estradiol undecylenate
Clinical data
Other namesSH-368; Estradiol undecenoate; Estra-1,3,5(10)-triene-3,17β-diol 17β-(10-undecenoate)
Routes of
administration		Intramuscular injection
Drug classEstrogen; Estrogen ester
Identifiers
  • [(8R,9S,13S,14S,17S)-3-Hydroxy-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthren-17-yl] undec-10-enoate
CAS Number
PubChem CID
ChemSpider
CompTox Dashboard (EPA)
ECHA InfoCard100.080.203
Chemical and physical data
FormulaC29H42O3
Molar mass438.652 g·mol−1
3D model (JSmol)
  • C[C@]12CC[C@H]3[C@H]([C@@H]1CC[C@@H]2OC(=O)CCCCCCCCC=C)CCC4=C3C=CC(=C4)O
  • InChI=1S/C29H42O3/c1-3-4-5-6-7-8-9-10-11-28(31)32-27-17-16-26-25-14-12-21-20-22(30)13-15-23(21)24(25)18-19-29(26,27)2/h3,13,15,20,24-27,30H,1,4-12,14,16-19H2,2H3/t24-,25-,26+,27+,29+/m1/s1
  • Key:VJTIEHBTPQORML-GVGNIZHQSA-N

Estradiol undecylenate (EUe; developmental code name SH-368) is an estrogen medication and estrogen ester which was never marketed. It is the C17β undecenoate (undecylenate) ester of estradiol. Following an intramuscular injection, EUe has a very prolonged effect, exceeding that of other estradiol esters like estradiol valerate and estradiol enanthate. Due to its very long duration of action, EUe releases only subthreshold amounts of estradiol at conventional doses. However, this may still be useful in menopausal hormone therapy.

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