triphenyliodoethylene triphenyliodoethylene triphenyliodoethylene (tpie), also known as iodotriphenylethylene or as phenylstilbene iodide, as well as triphenylvinyl iodide, is a synthetic nonsteroidal estrogen of the triphenylethylene group that is related to triphenylchloroethylene and triphenylbromoethylene and was never marketed. triphenyliodoethyleneclinical dataother namestpie; iodotriphenylethylene; phenylstilbene iodide; triphenylvinyl iodidedrug classnonsteroidal estrogenidentifiers iupac name (1-iodo-2,2-diphenylethenyl)benzene pubchem cid12139089chemical and physical dataformulac20h15imolar mass382.244 g·mol−13d model (jsmol)interactive image smiles c1=cc=c(c=c1)c(=c(c2=cc=cc=c2)i)c3=cc=cc=c3 inchi inchi=1s/c20h15i/c21-20(18-14-8-3-9-15-18)19(16-10-4-1-5-11-16)17-12-6-2-7-13-17/h1-15hkey:dvjcegltpuewnx-uhfffaoysa-n