cyclarbamate cyclarbamate cyclarbamate (inn; casmalon), also known as cyclopentaphene, is a muscle relaxant and tranquilizer of the carbamate family which has been marketed by cassenne in france since 1961. cyclarbamateclinical dataother namesbsm-906matc codenonelegal statuslegal status in general: ℞ (prescription only) identifiers iupac name cyclopentane-1,1-diyldimethanediyl bis(phenylcarbamate) cas number5779-54-4pubchem cid72076chemspider65062unii779291866jchemblchembl2104142comptox dashboard (epa)dtxsid60206480 echa infocard100.024.821 chemical and physical dataformulac21h24n2o4molar mass368.433 g·mol−13d model (jsmol)interactive image smiles o=c(occ1(cccc1)coc(=o)nc2ccccc2)nc3ccccc3 inchi inchi=1s/c21h24n2o4/c24-19(22-17-9-3-1-4-10-17)26-15-21(13-7-8-14-21)16-27-20(25)23-18-11-5-2-6-12-18/h1-6,9-12h,7-8,13-16h2,(h,22,24)(h,23,25)key:irzvvdmceznncw-uhfffaoysa-n