diethylstilbestrol diacetate diethylstilbestrol diacetate diethylstilbestrol diacetate (desda) (brand name hormostilboral stark) is a synthetic, nonsteroidal estrogen of the stilbestrol group and an ester of diethylstilbestrol (des) that was introduced for clinical use in the 1940s and was formerly marketed but is now no longer available. diethylstilbestrol diacetateclinical datatrade nameshormostilboral starkidentifiers iupac name (3e)-3-hexene-3,4-diyldi-4,1-phenylene diacetate cas number5965-06-0chemspider2297470chemical and physical dataformulac22h24o4molar mass352.430 g·mol−13d model (jsmol)interactive image smiles cc\c(=c(\cc)c1=cc=c(oc(c)=o)c=c1)c1=cc=c(oc(c)=o)c=c1 inchi inchi=1s/c22h24o4/c1-5-21(17-7-11-19(12-8-17)25-15(3)23)22(6-2)18-9-13-20(14-10-18)26-16(4)24/h7-14h,5-6h2,1-4h3/b22-21+key:nfcakxyimsrnlp-qurgraslsa-n