Molecular Formula: C16H17N2NaO4S Molecular Weight (g/mol): 356.372 MDL Number: MFCD00069666 InChI Key: FCPVYOBCFFNJFS-LQDWTQKMSA-M Synonym: penicillin g sodium,penicillin g sodium salt,crystapen,benzylpenicillin sodium,american penicillin,sodium penicillin g,benzylpenicillin sodium salt,sodium penicillin,pencillin g sodium,sodium benzylpenicillinate PubChem CID: 23668834 ChEBI: CHEBI:51765 IUPAC Name: sodium;(2S,5R,6R)-3,3-dimethyl-7-oxo-6-[(2-phenylacetyl)amino]-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate SMILES: CC1(C(N2C(S1)C(C2=O)NC(=O)CC3=CC=CC=C3)C(=O)[O-])C.[Na+]