ciclobendazole ciclobendazole ciclobendazole is an anthelmintic, that is a pharmaceutical drug against parasitic worms. it underwent a clinical trial in the 1970s, where it was found to be as effective as mebendazole in the treatment of hookworm infection and ascariasis, but significantly less effective in the treatment of trichuriasis. ciclobendazoleclinical dataatc codep02ca04 (who) identifiers iupac name methyl n-carbamate cas number31431-43-3 ypubchem cid35803chemspider32933 nuniijf3kq40j31keggd03623 ycomptox dashboard (epa)dtxsid9057713 echa infocard100.046.018 chemical and physical dataformulac13h13n3o3molar mass259.265 g·mol−13d model (jsmol)interactive image smiles coc(=o)nc3nc2ccc(c(=o)c1cc1)cc23 inchi inchi=1s/c13h13n3o3/c1-19-13(18)16-12-14-9-5-4-8(6-10(9)15-12)11(17)7-2-3-7/h4-7h,2-3h2,1h3,(h2,14,15,16,18) nkey:oxlkomyhdyvidm-uhfffaoysa-n n ny (what is this?) (verify) it is not known to be marketed anywhere in the world.