cefmatilen cefmatilen cefmatilen (inn, codenamed s-1090) is an orally-active cephalosporin antibiotic. it was developed in japan and first described in 1992. cefmatilenclinical dataroutes ofadministrationoralatc codenoneidentifiers iupac name (6r,7r)-7--8-oxo-3--5-thia-1- azabicyclooct-2-ene-2-carboxylic acid cas number140128-74-1 y 154776-45-1 (hcl · h2o)pubchem cid9690121chemspider4912110 yuniit750um24h8chemblchembl2104438comptox dashboard (epa)dtxsid50161236 chemical and physical dataformulac15h14n8o5s4molar mass514.57 g·mol−13d model (jsmol)interactive image smiles c1c(=c(n2(s1)(c2=o)nc(=o)/c(=n\o)/c3=csc(=n3)n)c(=o)o)scsc4=nnn=c4 inchi inchi=1s/c15h14n8o5s4/c16-15-18-5(2-30-15)8(21-28)11(24)19-9-12(25)23-10(14(26)27)6(3-29-13(9)23)31-4-32-7-1-17-22-20-7/h1-2,9,13,28h,3-4h2,(h2,16,18)(h,19,24)(h,26,27)(h,17,20,22)/b21-8-/t9-,13-/m1/s1 ykey:ueqvtksaexanez-ycrcpznhsa-n y (verify) in vitro, cefmatilen is highly active against a variety of gram-positive and gram-negative bacteria, including streptococcus pyogenes and neisseria gonorrhoeae.