Synonyms: Pregn-4-ene-3,20-dione, 16,17-dihydroxy-, (16α)-;16a,17-Dihydroxyprogesterone;16a,17a-Dihydroxypregn-4-ene-3,20-dione;16a,17a-Dihydroxyprogesterone;4-Pregnen-16a,17a-diol-3,20-dione;Alfasone;Algestone;Alphasone;4-Pregnen-16alpha,17alpha-diol-3,20-dione;Algestonum [Latin];