Broparestrol

Broparestrol (INN) (brand names Acnestrol, Longestrol), also known as α-bromo-α,β-diphenyl-β-p-ethylphenylethylene (BDPE), is a synthetic, non-steroidal selective estrogen receptor modulator (SERM) of the triphenylethylene group that is or was used in Europe as a dermatological agent and for the treatment of breast cancer. The drug is described as slightly estrogenic and potently antiestrogenic, and inhibits mammary gland development and suppresses prolactin levels in animals. It is structurally related to clomifene and diethylstilbestrol.