fenclozic acid fenclozic acid fenclozic acid is an analgesic, antipyretic, and anti-inflammatory drug. it has been withdrawn in 1970 due to jaundice. fenclozic acididentifiers iupac name acetic acid cas number17969-20-9 ypubchem cid28858chemspider26843 nunii58srq4dv53comptox dashboard (epa)dtxsid4046157 chemical and physical dataformulac11h8clno2smolar mass253.70 g·mol−13d model (jsmol)interactive image smiles c1cc(ccc1c2nc(cs2)cc(=o)o)cl inchi inchi=1s/c11h8clno2s/c12-8-3-1-7(2-4-8)11-13-9(6-16-11)5-10(14)15/h1-4,6h,5h2,(h,14,15) nkey:apbskhyxxkhjfk-uhfffaoysa-n n ny (what is this?) (verify)