clorindione clorindione clorindione is a vitamin k antagonist. it is a derivative of phenindione. clorindioneclinical dataatc codeb01aa09 (who) identifiers iupac name 2-(4-chlorophenyl)-1h-indene-1,3(2h)-dione cas number1146-99-2pubchem cid70846chemspider64010 yunii541c7ws64rkeggd07135 ychemblchembl278519 ycomptox dashboard (epa)dtxsid0046228 echa infocard100.013.230 chemical and physical dataformulac15h9clo2molar mass256.69 g·mol−13d model (jsmol)interactive image smiles clc1ccc(cc1)c3c(=o)c2ccccc2c3=o inchi inchi=1s/c15h9clo2/c16-10-7-5-9(6-8-10)13-14(17)11-3-1-2-4-12(11)15(13)18/h1-8,13h ykey:njduwaxiurwwln-uhfffaoysa-n y (verify)