11β-Methoxyestradiol
11β-Methoxyestradiol is a synthetic steroidal estrogen which was never marketed. It has about 86% of the relative binding affinity of estradiol for the estrogen receptor. 11β-MeOE2 is structurally related to moxestrol. 11β-MeOE2 and moxestrol are substantially more potent than their non-methoxylated analogues in mice.