Penicillin G Sulfoxide

Penicillin G Sulfoxide is a sulfoxide derivative of Penicillin G, obtained by oxidizing the sulfur atom in the beta-lactam structure to a sulfinyl group (S=O). It is mainly used for research purposes, particularly to study antibiotic modifications or degradation pathways—not for therapeutic or veterinary applications. The directory classifies it as a commercial API with a semi-synthetic source/manufacturing origin. Other names for this substance include Benzylpenicillin R-sulfoxide and Benzylpenicillin S-sulfoxide. It is also listed for alternate use as: API Impurity, API Intermediate. Its PubChem CID is 107496.

CAS No 4052-54-4
Molecular Formula C16H18N2O5S
Molecular Weight 350.4 g/mol
Synonyms (2S,5R,6R)-3,3-dimethyl-4,7-dioxo-6-[(2-phenylacetyl)amino]-4λ4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid

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