SMILES: C1C(=C(N2[C@H](S1)[C@@H](C2=O)NC(=O)CCC[C@H](C(=O)[O-])[NH3+])C(=O)[O-])CO
Description: The molecule is a cephalosporin carboxylic acid anion that is the conjugate base of deacetylcephalosporin C, arising from deprotonation of both carboxy groups and protonation of the amino group; major species at pH 7.3. It is a conjugate base of a deacetylcephalosporin C.