List of estrogen esters

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Estradiol, the base estrogen of most estrogen esters.

This is a list of estrogen esters, or ester prodrugs of estrogens. It includes esters, as well as ethers, of steroidal estrogens like estradiol, estrone, and estriol and of nonsteroidal estrogens like the stilbestrols diethylstilbestrol and hexestrol.

Esters of steroidal estrogens

Estradiol esters


Many esters of estradiol have been marketed, including the following major esters:[1][2]

And the following less commonly used esters:[1][2]

The following nitrogen mustard ester of estradiol is a cytostatic antineoplastic agent and has been marketed:[1][2]

Never marketed

A number of other estradiol esters which have not been marketed include:[2]

The following cytostatic antineoplastic nitrogen mustard esters of estradiol have not been marketed:[2]

  • Alestramustine (estradiol 3-(bis(2-chloroethyl)carbamate), 17-ester with L-alanine)
  • Atrimustine (KM-2210; bestrabucil, busramustine)
  • Estradiol mustard (NSC-112259; chlorphenacyl estradiol diester)
  • Estramustine (Leo 275; Ro 21-8837)
  • Estromustine (Leo 271 f; estrone 17β-3-N-bis(2-chloroethyl)carbamate, estrone–cytostatic complex)

Estrone esters


Esters of estrone that have been marketed include:[1][2]

Never marketed

Other estrone esters which are notable but have not been marketed include:

Estriol esters


Esters of estriol that have been marketed include:[1][2]

Never marketed

The following ester of estriol was never marketed:

Ethinylestradiol esters


The following esters of ethinylestradiol exist and have been marketed:[1][2]

Never marketed

Esters of other steroidal estrogens


The following esters of other estrogens exist and have been marketed:[1]

Ethers of steroidal estrogens


A number of estrogen ethers also exist and have been marketed, including:[22][1]

Never marketed

A few other estrogen ethers which are notable but have not been marketed include:[22]

Esters of nonsteroidal estrogens

Diethylstilbestrol esters


Major esters of diethylstilbestrol include:

  • Diethylstilbestrol dipropionate (Agostilben, Biokeral, Clinestrol, Cyclen, Estilbin, Estril, Neobenzoestrol, Orestol, Oroestrol, Ostregenin, Prostilbene, Stilbestriol DP, Stilboestrolum Dipropionicum, Stilboestrol, Synestrin, Willestrol)
  • Fosfestrol (diethylstilbestrol diphosphate) (Honvan, Difostilben, Fosfostilben, Fostrolin, Stilbol, Stilphostrol, Vagestrol)

Less commonly used esters of diethylstilbestrol include:

Never marketed

As well as the following nitrogen mustard ester:

  • ICI-85966 (Stilbostat; diethylstilbestrol bis(di(2-chloroethyl)carbamate))

Hexestrol esters


Never marketed

The following nitrogen mustard ester of hexestrol was never marketed:

  • Phenestrol (fenestrol; hexestrol bis[4-[bis(2-chloroethyl)amino]phenylacetate)

Esters of other nonsteroidal estrogens


Ethers of nonsteroidal estrogens



  • Diethylstilbestrol monobenzyl ether (benzelstilbestrol) (Monozol, Hypantin, Pituitrope)
  • Dimestrol (dianisylhexene, diethylstilbestrol dimethyl ether, dimethoxydiethylstilbestrol) (Depot-Ostromon, Synthila)
  • Mestilbol (diethylstilbestrol monomethyl ether) (Monomestro or Monomestrol)

See also


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