The chemical 17alpha-Estradiol has a designated molecular formula of C18H24O2 and a molecular weight of 272.388 g/mol. Synonyms may include: Alfatradiol, 4-06-00-06611 (Beilstein Handbook Reference), BRN 2698044, CCRIS 7203, 3,17-Dihydroxyestratriene, 3,17alpha-Dihydroxyestra-1,3,5(10)-triene, 3,17alpha-Dihydroxyoestra-1,3,5(10)-triene, 3,17-alpha-Dihydroxyoestra-1,3,5(10)-triene, EINECS 200-354-8, Epiestradiol, alpha-Estradiol (ChemID). 17alpha-Estradiol has been assigned a MeSH pharmacological action of: 5-alpha Reductase Inhibitor.