Since the discovery of the estrogenic activity of diethylstilbestrol by Dodds and co-workers, many other relatively simple compounds have been tested for this property. Of the compounds studied, some derivatives of triphenylethylene, 3t4 diethylstilbestrol and hexestrol5 appear to show promise of clinical usefulness. In view of the interest in the effectiveness and duration of action of the esters of estradiol, diethylstilbestrol and ...