The molecule is a monocarboxylic acid anion that is the conjugate base of 6-formamidopenicillanic acid, formed by proton loss from the carboxy group. It is a penamcarboxylate and a monocarboxylic acid anion. It is a conjugate base of a 6-formamidopenicillanic acid.
(2S,5R,6R)-6-formamido-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate