diethylstilbestrol monobenzyl ether diethylstilbestrol monobenzyl ether diethylstilbestrol monobenzyl ether (brand names monozol, hypantin, pituitrope), also known as benzelstilbestrol, is a synthetic, nonsteroidal estrogen of the stilbestrol group and an ether of diethylstilbestrol (des) that is described as a pituitary gland inhibitor (antigonadotropin) and was formerly marketed but is now no longer available. it was first synthesized by wallace & tiernan company in 1952, and was described by them as having only weak estrogenic activity. the drug was used to treat gynecological conditions and infertility in women. diethylstilbestrol monobenzyl etherclinical datatrade namesmonozol, hypantin, pituitropeother namesbenzelstilbestroldrug classnonsteroidal estrogen; estrogen etheridentifiers iupac name 4-phenol cas number6202-26-2 ypubchem cid3036244chemspider2300304uniidwy5lu966cchemical and physical dataformulac25h26o2molar mass358.481 g·mol−13d model (jsmol)interactive image smiles cc/c(=c(/cc)\c1=cc=c(c=c1)occ2=cc=cc=c2)/c3=cc=c(c=c3)o inchi inchi=1s/c25h26o2/c1-3-24(20-10-14-22(26)15-11-20)25(4-2)21-12-16-23(17-13-21)27-18-19-8-6-5-7-9-19/h5-17,26h,3-4,18h2,1-2h3/b25-24+key:fvldpsznpfwqqp-ocozrvbesa-n