EN
ethinylestradiol Ethinyl Estradiol ethinyloestradiol (1S,10R,11S,14R,15S)-14-ethynyl-15-methyltetracyclo[8.7.0.0^{2,7}.0^{11,15}]heptadeca-2,4,6-triene-5,14-diol 17-ethinyl-3,17-estradiol
EN
Ethinylestradiol is an estrogen medication which is used widely in birth control pills in combination with progestins.
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