cefpirome cefpirome cefpirome is a fourth-generation cephalosporin. trade names include cefrom, keiten, broact, and cefir. cefpirome is considered highly active against gram-negative bacteria, including pseudomonas aeruginosa, and gram-positive bacteria. cefpiromeclinical dataahfs/drugs.cominternational drug namesatc codej01de02 (who) identifiers iupac name 1--5h,6h,7h-cyclopentapyridin-1-ium cas number84957-29-9 ypubchem cid6917674chemspider23089536 nuniis72q2f09hykeggd07649 ychemblchembl2106076 ncomptox dashboard (epa)dtxsid2048244 chemical and physical dataformulac22h22n6o5s2molar mass514.58 g·mol−13d model (jsmol)interactive image smiles con=c(c1csc(n1)n)c(=o)nc2c3n(c2=o)c(=c(cs3)c4cccc5c4ccc5)c(=o) inchi inchi=1s/c22h22n6o5s2/c1-33-26-15(13-10-35-22(23)24-13)18(29)25-16-19(30)28-17(21(31)32)12(9-34-20(16)28)8-27-7-3-5-11-4-2-6-14(11)27/h3,5,7,10,16,20h,2,4,6,8-9h2,1h3,(h3-,23,24,25,29,31,32)/b26-15-/t16-,20+/m1/s1 nkey:dkoqgjhphltojr-xeclgwkcsa-n n ny (what is this?) (verify) spectrum of bacterial susceptibility and resistance bacteroides fragilis, enterococci, pseudomonas spp. and staphylococci are resistant to cefpirome sulfate, and some haemophilus spp. and pneumococci have developed resistance to it to varying degrees.