Epiestriol (INN) (brand names Actriol, Arcagynil, Klimadoral), or epioestriol (BAN), also known as 16β-epiestriol or simply 16-epiestriol as well as 16β-hydroxy-17β-estradiol, is an endogenous, steroidal, weak estrogen, and the 16-epimer of estriol (which is 16α-hydroxy-17β-estradiol). Epiestriol is (or has previously been) used clinically in the treatment of acne. In addition to its estrogenic actions, epiestriol has been found to possess significant anti-inflammatory properties without glycogenic activity or immunosuppressive effects, an interesting finding that is in contrast to conventional anti-inflammatory steroids like hydrocortisone (a glucocorticoid).

CAS：547-81-9
中文别名：异雌三醇;雌三醇杂质F;
英文别名：16beta-hydroxyestradiol;16-Epiestratriol;16-epioestriol;EPIESTRIOL,16;Actriol;16b,17b-Estriol;16-EPISTRIOL;Epioestriol;Epiestriol;Estriol (3,16.β.,17.β.);16-EPIESTRIOL;Estra-1,3,5(10)-triene-3,16,17-triol, (16β,17β)-;
分子式：C18H24O3
分子量：288.381
精确质量：288.173
Psa：60.69
Logp：2.58

UNII：8XZ32LI44K

密度：1.255g/cm3
沸点：469ºC at 760 mmHg
熔点：289-291ºC
闪点：220.8ºC
折射率：1.624
储存条件：-20ºC Freezer

WGK Germany：3