estriol tripropionate estriol tripropionate estriol tripropionate (brand name estriel), or estriol tripropanoate, is an estrogen medication. it is an estrogen ester, specifically, an ester of estriol. estriol tripropionateclinical datatrade namesestrielother namesoestriol tripropionate; estriol tripropanoateroutes ofadministrationintramuscular injectiondrug classestrogen; estrogen esteridentifiers iupac name phenanthren-16-yl] propanoate cas number2236-31-9pubchem cid102232drugbankdb14641chemspider92362uniis2a0p1afq9comptox dashboard (epa)dtxsid4057689 echa infocard100.017.090 chemical and physical dataformulac27h36o6molar mass456.579 g·mol−13d model (jsmol)interactive image smiles ccc(=o)o1c23ccc4cc(oc(=o)cc)ccc43cc2(c)1oc(=o)cc inchi inchi=1s/c27h36o6/c1-5-23(28)31-17-9-11-18-16(14-17)8-10-20-19(18)12-13-27(4)21(20)15-22(32-24(29)6-2)26(27)33-25(30)7-3/h9,11,14,19-22,26h,5-8,10,12-13,15h2,1-4h3/t19-,20-,21+,22-,26+,27+/m1/s1key:onmzmzjezhmwql-reuudlsrsa-n