(6R,7R)-3-[(acetyloxy)methyl]-8-oxo-7-[[2-(1H-tetrazol-1-yl)acetyl]amino]-5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid
(6R,7R)-3-[(acetyloxy)methyl]-8-oxo-7-[[2-(1H-tetrazol-1-yl)acetyl]amino]-5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid