hydroxyestrone diacetate hydroxyestrone diacetate hydroxyestrone diacetate (brand names colpoginon, colpormon, hormobion, hormocervix) (former developmental code name rd-310), or 16α-hydroxyestrone diacetate, also known as 3,16α-dihydroxyestra-1,3,5(10)-trien-17-one 3,16α-diacetate, is a synthetic, steroidal estrogen which has been marketed in france, spain, brazil, and argentina. it is a derivative of 16α-hydroxyestrone with an acetate esters attached at the c3 and c16α positions. hydroxyestrone diacetateclinical datatrade namescolpoginon, colpormon, hormobion, hormocervixother namesrd-310; 16α-hydroxyestrone diacetate; 3,16α-dihydroxyestra-1,3,5(10)-trien-17-one 3,16α-diacetateroutes ofadministrationby mouthdrug classestrogen; estrogen esteridentifiers iupac name phenanthren-16-yl] acetate cas number1247-71-8pubchem cid102046chemspider92184unii2u3voe52dgcomptox dashboard (epa)dtxsid50878610 echa infocard100.013.634 chemical and physical dataformulac22h26o5molar mass370.445 g·mol−13d model (jsmol)interactive image smiles cc(=o)oc1cc2c3ccc4=c(c3ccc2(c1=o)c)c=cc(=c4)oc(=o)c inchi inchi=1s/c22h26o5/c1-12(23)26-15-5-7-16-14(10-15)4-6-18-17(16)8-9-22(3)19(18)11-20(21(22)25)27-13(2)24/h5,7,10,17-20h,4,6,8-9,11h2,1-3h3/t17-,18-,19+,20-,22+/m1/s1key:qzqsenrwylqipc-jpvhlgffsa-n