Ceftobiprole drug molecule. Ball-and-stick molecular model of ceftobiprole, a fifth-generation cephalosporin antibiotic. It is used in the treatment of hospital- and community-acquired pneumonia. Its chemical formula is C20H22N8O6S2. Atoms are represented as spheres with conventional colour coding: hydrogen (white), carbon (black), oxygen (red), nitrogen (blue), and sulphur (yellow).