The molecule is a monocarboxylic acid anion that is the conjugate base of (3S,5S)-carbapenam-3-carboxylic acid, obtained by deprotonation of the carboxy group. It is a conjugate base of a (3S,5S)-carbapenam-3-carboxylic acid.
(2S,5S)-7-oxo-1-azabicyclo[3.2.0]heptane-2-carboxylate