clazuril clazuril clazuril is a drug used in veterinary medicine as a coccidiostat. clazurilclinical dataatcvet codeqp51aj02 (who) identifiers iupac name (4-chlorophenyl)acetonitrile cas number101831-36-1pubchem cid58901chemspider53093uniio8w0r05772chemblchembl2104190chemical and physical dataformulac17h10cl2n4o2molar mass373.19 g·mol−13d model (jsmol)interactive image smiles clc1ccc(cc1)c(c#n)c3c(cl)cc(n2/n=c\c(=o)nc2=o)cc3 inchi inchi=1s/c17h10cl2n4o2/c18-11-3-1-10(2-4-11)14(8-20)13-6-5-12(7-15(13)19)23-17(25)22-16(24)9-21-23/h1-7,9,14h,(h,22,24,25)key:quutuglqzlnabv-uhfffaoysa-n