cefalexin, cephalexin, c16h17n3o4s molecule. it is a beta-lactam, first-generation cephalosporin antibiotic with bactericidal

antibacterial antibiotic atom atomic bacterial betalactam c16h17n3o4s carbon cefalexin cefalosporin cephalexin cephalosporin chemical chemistry drawing drug flat formula hydrogen icon illustration infection molecular molecule nitrogen organic oxygen pneumonia strep structural structure sulfur throat