Keywords: Ethinylestrandiol Structural Formulae V.1.png en Ethinylestrandiol_Structural_Formulae de Ethinylestrandiol_Strukturformel own J Ethinylestradiol-2D-skeletal svg ü 2011-10-26 Ethinylestradiol-2D-skeletal svg Cc-zero Ethinylestradiol Chemical structures to explain nomenclature |