ethinylestradiol

例句：

1. 1.This compound is used in the production of ethynestradiol.
   这种化合物用于生产乙炔雌二醇。
2. 2. Ethynestradiol is a hormone that regulates menstrual cycles.
   乙炔雌二醇是一种调节月经周期的激素。
3. 3. The study found that ethynestradiol could potentially reduce the risk of breast cancer.
   研究发现，乙炔雌二醇可能降低乳腺癌的风险。