fenbutrazate fenbutrazate fenbutrazate (inn), also known as phenbutrazate (ban), is a psychostimulant used as an appetite suppressant under the trade names cafilon, filon, and sabacid in europe, japan, and hong kong. it is a derivative of phenmetrazine and may function as a prodrug due to its similarity to phendimetrazine. fenbutrazateclinical dataroutes ofadministrationoralatc codenonelegal statuslegal status in general: ℞ (prescription only) identifiers iupac name 2-(3-methyl-2-phenylmorpholin-4-yl)ethyl 2-phenylbutanoate cas number4378-36-3pubchem cid20395chemspider19210uniibky8h56395chemblchembl2104316comptox dashboard (epa)dtxsid6057746 echa infocard100.022.256 chemical and physical dataformulac23h29no3molar mass367.489 g·mol−13d model (jsmol)interactive image smiles o=c(occn1c(c(occ1)c2ccccc2)c)c(c3ccccc3)cc