SMILES: C[C@@]1([C@@H](N2[C@H](S1(=O)=O)CC2=O)C(=O)[O-])CN3C=CN=N3
Description: The molecule is a penicillinate anion that is the conjugate base of tazobactam, obtained by deprotonation of the carboxy group. It is a conjugate base of a tazobactam.