is conjugate base of benzylpenicillin benzylpenicillin(1-) (2S,5R,6R)-3,3-dimethyl-7-oxo-6-[(phenylacetyl)amino]-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate 2,2-dimethyl-6beta-(phenylacetamido)penam-3alpha-carboxylate 333.091 333.38326 Beilstein:3915298 C16H17N2O4S CHEBI:51354 InChI=1S/C16H18N2O4S/c1-16(2)12(15(21)22)18-13(20)11(14(18)23-16)17-10(19)8-9-6-4-3-5-7-9/h3-7,11-12,14H,8H2,1-2H3,(H,17,19)(H,21,22)/p-1/t11-,12+,14-/m1/s1 JGSARLDLIJGVTE-MBNYWOFBSA-M [H][C@]12SC(C)(C)[C@@H](N1C(=O)[C@H]2NC(=O)Cc1ccccc1)C([O-])=O chebi_ontology penicillin G penicillinate anion