<unk>  also known as estra-1,3,5(10)-trien-3-ol-17-one, is a naturally occurring<unk> steroid with double bonds at the C1, C3, and C5 positions, a hydroxyl group at the C3 position, and a ketone group at the C17 position. The name<unk> was derived from the chemical terms estrin (estra-1,3,5(10)-triene) and ketone. A variety of<unk> esters have been synthesized and described. These include the marketed esters<unk> acetate,<unk> sulfate,<unk> tetraacetylglucoside, and estropipate (piperazine<unk> sulfate), and the never-marketed esters<unk> benzoate,<unk> cyanate,<unk> glucuronide, and<unk> sulfamate.
Estrone 
Methyltestosterone
Allyltestosterone
Androgen
Estradiol
Estradiol 
Dihydrotestosterone
2-Hydroxyestradiol