hexestrol dicaprylate hexestrol dicaprylate hexestrol dicaprylate (brand name taston), or dioctanoylhexestrol, is a synthetic, nonsteroidal estrogen of the stilbestrol group related to diethylstilbestrol that is no longer marketed. it is a long-acting ester of hexestrol. hexestrol dicaprylateidentifiers iupac name phenyl] octanoate cas number20305-51-5pubchem cid161308chemspider141698uniij9dfr4it9zcomptox dashboard (epa)dtxsid50942446 chemical and physical dataformulac34h50o4molar mass522.770 g·mol−13d model (jsmol)interactive image smiles cccccccc(=o)oc1=cc=c(c=c1)c(cc)c(cc)c2=cc=c(c=c2)oc(=o)ccccccc inchi inchi=inchi=1s/c34h50o4/c1-5-9-11-13-15-17-33(35)37-29-23-19-27(20-24-29)31(7-3)32(8-4)28-21-25-30(26-22-28)38-34(36)18-16-14-12-10-6-2/h19-26,31-32h,5-18h2,1-4h3key:jzmctyycjniobo-uhfffaoysa-n