(6R,7R)-3-(acetoxymethyl)-7-(2-(2-aminothiazol-4-yl)acetamido)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid; (6R-trans)-3-[(Acetyloxy)methyl]-7-[[(2-amino-4-thiazolyl)acetyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid
