carfecillin carfecillin carfecillin is a beta-lactam antibiotic. it is a phenyl derivative of carbenicillin, acting as a prodrug. carfecillinclinical dataatc codeg01aa08 (who) identifiers iupac name (2s,5r,6r)-3,3-dimethyl-7-oxo-6-amino]-4-thia-1-azabicycloheptane-2-carboxylic acid cas number27025-49-6pubchem cid33672chemspider31054 yunii9uu4xdb74xchebichebi:3414 ychemblchembl1095283 ycomptox dashboard (epa)dtxsid10891704 echa infocard100.043.778 chemical and physical dataformulac23h22n2o6smolar mass454.50 g·mol−13d model (jsmol)interactive image smiles o=c(o)3n4c(=o)(nc(=o)c(c1ccccc1)c(=o)oc2ccccc2)4sc3(c)c inchi inchi=1s/c23h22n2o6s/c1-23(2)17(21(28)29)25-19(27)16(20(25)32-23)24-18(26)15(13-9-5-3-6-10-13)22(30)31-14-11-7-4-8-12-14/h3-12,15-17,20h,1-2h3,(h,24,26)(h,28,29)/t15?,16-,17+,20-/m1/s1 ykey:nzdasshfkwdbbu-kvmcethssa-n y (verify)