(6R-cis)-1-((3-((Acetyloxy)methyl)-7-methoxy-8-oxo-5-thia-1-azabicyclo(4.2.0)oct-2-en-2-yl)carbonyl)-L-proline S,S-dioxide 116507-04-1 3-Acetoxymethyl-7-methoxy-1-aza-5-thia-8-oxo-bicyclo(4.2.0)oct-2-ene-2-carboxypyrrolidine carboxamide L 658,758 L 658758 L-658,758 L-658758 L-Proline, 1-((3-((acetyloxy)methyl)-7-methoxy-8-oxo-5-thia-1-azabicyclo(4.2.0)oct-2-en-2-yl)carbonyl)-, S,S-dioxide, (6R-cis)-