hymecromone hymecromone hymecromone (4-methylumbelliferone) is a drug used in bile therapy. it is used as choleretic and antispasmodic drugs and as a standard for the fluorometric determination of enzyme activity. hymecromoneclinical dataother names4-methylumbelliferoneahfs/drugs.cominternational drug namesatc codea05ax02 (who) identifiers iupac name 7-hydroxy-4-methylchromen-2-one cas number90-33-5 ypubchem cid5280567drugbankdb07118 ychemspider4444190 yunii3t5ng4q468keggd00170 ychebichebi:17224 ychemblchembl12208 ycomptox dashboard (epa)dtxsid8025670 echa infocard100.001.806 chemical and physical dataformulac10h8o3molar mass176.171 g·mol−13d model (jsmol)interactive image smiles cc1=cc(=o)oc2=c1c=cc(=c2)o inchi inchi=1s/c10h8o3/c1-6-4-10(12)13-9-5-7(11)2-3-8(6)9/h2-5,11h,1h3 ykey:hshnitrmyyllcv-uhfffaoysa-n y (verify) hymecromone is a crystalline solid with a melting point of 194–195 °c. it is soluble in methanol and glacial acetic acid.