clobenztropine clobenztropine clobenztropine is an antihistamine. clobenztropineclinical dataatc codenoneidentifiers iupac name 3--8-methyl-8-azabicyclooctane cas number5627-46-3pubchem cid1687chemspider10221075uniim8cdt278f8chemblchembl2146132comptox dashboard (epa)dtxsid5043897 chemical and physical dataformulac21h24clnomolar mass341.88 g·mol−13d model (jsmol)interactive image smiles cn41cc4c(c1)oc(c2ccccc2)c3ccc(cl)cc3