The molecule is a penicillanic acid having a (6R)-formamido substituent. It derives from a 6-aminopenicillanic acid. It is a conjugate acid of a 6-formamidopenicillanate.
(2S,5R,6R)-6-formamido-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid