Penicillin G. Molecular model of the antibiotic drug penicillin G (C16.H18.N2.O4.S), also known as benzylpenicillin. This beta-lactam antibiotic is used in the treatment of bacterial infections. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), nitrogen (blue), oxygen (red) and sulphur (yellow). Illustration.
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