metacetamol metacetamol metacetamol (developmental code name bs-749), also known as 3-hydroxyacetanilide and amap, is a non-toxic regioisomer of paracetamol with analgesic and antipyretic properties, but has never been marketed as a drug. metacetamolclinical dataother namesn-acetyl-meta-aminophenol; amap; meta-acetyl-aminophenol; 3-hydroxyacetanilideidentifiers iupac name n-(3-hydroxyphenyl)acetamide cas number621-42-1 ypubchem cid12124chemspider11626 yuniiv942zcn81hchebichebi:76987 ychemblchembl9419 ycomptox dashboard (epa)dtxsid3022089 echa infocard100.009.717 chemical and physical dataformulac8h9no2molar mass151.165 g·mol−13d model (jsmol)interactive imagemelting point146 to 149 °c (295 to 300 °f) smiles cc(=o)nc1=cc(=cc=c1)o inchi inchi=inchi=inchi=1s/c8h9no2/c1-6(10)9-7-3-2-4-8(11)5-7/h2-5,11h,1h3,(h,9,10) ykey:qlnwxbagrtukki-uhfffaoysa-n y