estrone acetate estrone acetate estrone acetate (brand name hovigal) is a semisynthetic, steroidal estrogen. it is an estrogen ester, specifically, an ester of estrone. estrone acetateidentifiers iupac name phenanthren-3-yl] acetate cas number901-93-9pubchem cid92846chemspider83814unii4l6usg266bchemblchembl1627997comptox dashboard (epa)dtxsid801009160 echa infocard100.163.707 chemical and physical dataformulac20h24o3molar mass312.409 g·mol−13d model (jsmol)interactive image smiles cc(=o)oc1ccc23cc4(c)(ccc4=o)3ccc2c1 inchi inchi=1s/c20h24o3/c1-12(21)23-14-4-6-15-13(11-14)3-5-17-16(15)9-10-20(2)18(17)7-8-19(20)22/h4,6,11,16-18h,3,5,7-10h2,1-2h3/t16-,17-,18+,20+/m1/s1key:kdpqtpzdvjhmet-xsygeplqsa-n