Estrogen ethers

Mestranol, sold under the brand names Enovid, Norinyl, and Ortho-Novum among others, is an estrogen medication which has been used in birth control pills, menopausal hormone therapy, and the treatment of menstrual disorders. It is formulated in combination with a progestin and is not available alone. It is taken by mouth.

Quinestrol, also known as ethinylestradiol cyclopentyl ether (EECPE), sold under the brand name Estrovis among others, is an estrogen medication which has been used in menopausal hormone therapy, hormonal birth control, and to treat breast cancer and prostate cancer. It is taken once per week to once per month by mouth.

Promestriene () (brand names Colpotrofin, Colpotrophine, Delipoderm), also known as estradiol 3-propyl 17β-methyl diether, is a synthetic estrogen which is used topically in a 1% cream formulation for the treatment of vaginal atrophy in women. It is the 3-propyl and 17β-methyl diether of estradiol and does not appear to convert into estradiol in the body. Promestriene is minimally absorbed and appears to have negligible systemic estrogenic effect. The drug has been described as a tropic agent and antiseborrheic. It has not been found to be effective in the treatment of pattern hair loss or oth

Moxestrol, sold under the brand name Surestryl, is an estrogen medication which has been used in Europe for the treatment of menopausal symptoms and menstrual disorders. It is taken by mouth. In addition to its use as a medication, moxestrol has been used in scientific research as a radioligand of the estrogen receptor.