flomoxef flomoxef flomoxef is an oxacephem antibiotic that was developed by shionogi. flomoxefclinical datatrade namesflumarinahfs/drugs.cominternational drug namesatc codej01dc14 (who) identifiers iupac name (6r,7r)-7-amino]-3-sulfanylmethyl]-7-methoxy-8-oxo-5-oxa-1-azabicyclooct-2-ene-2-carboxylic acid cas number99665-00-6 ypubchem cid65864chemspider59274 nuniiv9e5u5xf42keggd07963 ychemblchembl15413 ncomptox dashboard (epa)dtxsid5048845 chemical and physical dataformulac15h18f2n6o7s2molar mass496.46 g·mol−13d model (jsmol)interactive imagemelting point82.5 to 87.5 °c (180.5 to 189.5 °f) smiles co1(2n(c1=o)c(=c(co2)csc3nnnn3cco)c(=o)o)nc(=o)csc(f)f inchi inchi=1s/c15h18f2n6o7s2/c1-29-15(18-8(25)6-31-13(16)17)11(28)23-9(10(26)27)7(4-30-12(15)23)5-32-14-19-20-21-22(14)2-3-24/h12-13,24h,2-6h2,1h3,(h,18,25)(h,26,27)/t12-,15+/m1/s1 nkey:uhrbtbzowwgkmk-domzbbrysa-n n ny (what is this?) (verify) it has been classified either as a second-generation or fourth-generation cephalosporin. it was patented in 1982 and approved for medical use in 1988 under the trade name flumarin.