is conjugate base of penicillinate anion tazobactam(1-) (2S,3S,5R)-3-methyl-4,4,7-trioxo-3-[(1H-1,2,3-triazol-1-yl)methyl]-4lambda(6)-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate 299.045 299.28400 A penicillinate anion that is the conjugate base of tazobactam, obtained by deprotonation of the carboxy group. C10H11N4O5S CHEBI:85193 C[C@]1(Cn2ccnn2)[C@@H](N2[C@@H](CC2=O)S1(=O)=O)C([O-])=O InChI=1S/C10H12N4O5S/c1-10(5-13-3-2-11-12-13)8(9(16)17)14-6(15)4-7(14)20(10,18)19/h2-3,7-8H,4-5H2,1H3,(H,16,17)/p-1/t7-,8+,10+/m1/s1 LPQZKKCYTLCDGQ-WEDXCCLWSA-M chebi_ontology tazobactam anion tazobactam