is conjugate base of monocarboxylic acid anion penamcarboxylate 6-formamidopenicillanic acid 6-formamidopenicillanate (2S,5R,6R)-6-formamido-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate 243.044 243.26000 6-formamido-2,2-dimethylpenam-3alpha-carboxylate A monocarboxylic acid anion that is the conjugate base of 6-formamidopenicillanic acid, formed by proton loss from the carboxy group. C9H11N2O4S CHEBI:59005 InChI=1S/C9H12N2O4S/c1-9(2)5(8(14)15)11-6(13)4(10-3-12)7(11)16-9/h3-5,7H,1-2H3,(H,10,12)(H,14,15)/p-1/t4-,5+,7-/m1/s1 MDQGTDMBVJCTBN-JCGDXUMPSA-M [H]C(=O)N[C@@H]1C(=O)N2[C@@H](C([O-])=O)C(C)(C)S[C@]12[H] chebi_ontology