estradiol and<unk> . Note the preservation of the two hydroxyl groups in<unk>  and the similar distance between them relative to estradiol, which is notable when it is considered that<unk>  was discovered serendipitously.<unk>  belongs to the stilbestrol (4,4'-dihydroxystilbene) group of compounds. It is a nonsteroidal open-ring analogue of the steroidal estrogen estradiol.<unk>  can be prepared from anethole, which also happens to be weakly estrogenic. Anethole was demethylated to form anol and anol then spontaneously dimerized into dianol and hexestrol, with<unk>  subsequently being synthesized via structural modification of hexestrol. As shown by X-ray crystallography, the molecular dimensions of<unk>  are almost identical to those of estradiol, particularly in regards to the distance between the terminal hydroxyl groups.
Diethylstilbestrol
Stilbestrol
Polydiethylstilbestrol phosphate
Ethinylestradiol sulfonate
Ethinylestradiol sulfate
Ethinylestradiol
Chloromethylandrostenediol
Estradiol dienantate