(5R,6S)-3-((2-(Formimidoylamino)ethyl)thio)-6-((R)-1-hydroxyethyl)-7-oxo-1-azabicyclo(3.2.0)hept-2-ene-2-carboxylic acid
(5R,6S)-3-((2-(Formimidoylamino)ethyl)thio)-6-((R)-1-hydroxyethyl)-7-oxo-1-azabicyclo(3.2.0)hept-2-ene-2-carboxylic Acid