Ethinyl estradiol - Wikipedia, the free encyclopedia

Ethinyl estradiol (EE) / ˌ ɛ θ ɨ n ɨ l ˌ iː s t r ə ˈ d aɪ. əl /, also sometimes written as ethinylestradiol, ethynyl estradiol, or ethinyl œstradiol, is a derivative of 17β-estradiol (E2), the major ... ...

en.wikipedia.org