SMILES: CC1=NN=C(S1)SCC2=C(N3[C@@H]([C@@H](C3=O)NC(=O)CN4C=NN=N4)SC2)C(=O)[O-]
Description: The molecule is a cephalosporin carboxylic acid anion having [(5-methyl-1,3,4-thiadiazol-2-yl)sulfanyl]methyl and (1H-tetrazol-1-ylacetyl)amino side-groups, formed by proton loss from the carboxy group of cefazolin. It is a conjugate base of a cefazolin.