cephalosporin derivatives ( cephalothin sodium , cephacetrile sodium , cefamandole lithium and nafate , cefoperazone sodium and ceftizoxime sodium ) have to be treated with 0.5n sodium hydroxide before determination with ellman 's reagent , which reacts with free thiol groups .
C3536856
cephalosporin
C0282391
ceftizoxime sodium