phenoxymethylpenicillin antibiotic penicillin v molecule.

phenoxymethylpenicillin antibiotic penicillin molecule chemical chemistry science scientific structure atoms atomic compound molecular computer model betalactam antibacterial betalactamase fleming peptidoglycan penam streptococcus staphylococcus pcn pen bacterium bacteria infection are represented as spheres conventional color coding hydrogen white carbon grey oxygen red nitrogen blue sulfur yellow