<unk>  <unk>  is a drug, an orally active synthetic nonsteroidal estrogen that was first synthesized in 1938.  In 1971 it was found to be a teratogen when given to pregnant women.
Diethylstilbestrol
Ethinylestradiol
Desoxymethyltestosterone
Ethisterone
Medroxyprogesterone acetate 
Gestodene
Hydroxyprogesterone caproate
Leuprolide