<unk> , or 16,17-epiestriol, also known as<unk> -hydroxy-17α-estradiol, as well as estra-1,3,5(10)-triene-3,16β,17α-triol, is a minor and weak endogenous steroidal estrogen that is related to<unk> -estradiol and estriol. Along with estriol,<unk>  has been detected in the urine of women during the late pregnancy stage. It shows preferential affinity for the ERβ over the ERα.
16β,17α-Epiestriol
8,9-Dehydroestradiol
8,9-Dehydroestrone
5α-Dihydroethisterone
3β-Androstanediol
3α-Androstanediol
17β-Dihydroequilin
20α-Dihydrotrengestone