proquazone proquazone proquazone is a nonsteroidal anti-inflammatory drug, known as an nsaid. proquazoneclinical dataatc codem01ax13 (who) identifiers iupac name 1-isopropyl-7-methyl-4-phenylquinazolin-2(1h)-one cas number22760-18-5 npubchem cid31508chemspider29222 nunii42vpj2980schemblchembl268501 ncomptox dashboard (epa)dtxsid4021210 echa infocard100.041.079 chemical and physical dataformulac18h18n2omolar mass278.355 g·mol−13d model (jsmol)interactive image smiles cc1=cc2=c(c=c1)c(=nc(=o)n2c(c)c)c3=cc=cc=c3 inchi inchi=1s/c18h18n2o/c1-12(2)20-16-11-13(3)9-10-15(16)17(19-18(20)21)14-7-5-4-6-8-14/h4-12h,1-3h3 nkey:jtigkvioeqasgt-uhfffaoysa-n n ny (what is this?) (verify) synthesis