Cefacetrile (Cephacetrile) is a broad-spectrum cephalosporin antibiotic with antimicrobial activity, used to study Gram-negative infections, acting similarly to cefotifen.

Gastric mucin is a large glycoprotein which is thought to play a major role in the protection of the gastrointestinal tract from acid, proteases, pathogenic microorganisms, and mechanical trauma.

Cefprozil (Cefzil) is a novel cephalosporin antibiotic with antiviral activity for the study of immune system disorders.