Chemical name: 17a-ethynyl-1,3,5(10)-estratriene-3,17b-diol 
Molecular weight: 296.4      C₂₀H₂₄O₂ 
CAS No.: 57-63-6     
Appearance: white or off-white crystalline powder, no odor.
Purity: 97.0%～103.0% (HPLC)
Packing: 20kg/fiber drum 
Product standard: CHP
Uses: Estrogen drug. 1. In the treatment of gonadal dysfunction, amenorrhoea, climacteric syndrome, etc.2. In the treatment of advanced breast cancer and advanced prostatic cancer; 3. As contraceptive.