What is "hexestrol"

n. estrogen compound used to treat menstrual irregularities and menopausal symptoms and to prevent pregnancy

Hexestrol ( INN) (brand name Synestrol, Synoestrol, Estrifar, Estronal, numerous others), also known as hexanestrol, hexoestrol, and dihydrodiethylstilbestrol, is a synthetic, non-steroidal estrogen of the stilbestrol group related to diethylstilbestrol that was used to treat estrogen deficiency but is now no longer employed medically.