0 Potassium benzylpenicillin CAS 113-98-4 In APIs, Pharmaceutical Chemicals, Products 113-98-4,Potassium benzylpenicillin,potassium [2S-(2alpha,5alpha,6beta)]-3,3-dimethyl-7-oxo-6-(phenylacetamido)-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate