<unk>  is a naturally occurring estrogen sex hormone found in horses as well as a medication. As the C3 sulfate ester sodium salt, it is a minor constituent (1.7%) of conjugated estrogens (CEEs; brand name Premarin). However, as equilin, with equilin sulfate being a major component of CEEs, is transformed into<unk>  in the body, analogously to the conversion of estrone into estradiol,<unk>  is, along with estradiol, the most important estrogen responsible for the effects of CEEs.
17β-Dihydroequilin
17α-Dihydroequilin
17β-Dihydroequilenin
17α-Dihydroequilenin
5α-Dihydroethisterone
17α-Epiestriol
8,9-Dehydroestradiol
Testosterone hexahydrobenzoate