5-Thia-1-azabicyclo4.2.0oct-2-ene-2-carboxylic acid, 3-(acetyloxy)methyl-8-oxo-7-(4-pyridinylthio)acetylamino-, (6R,7R)-;5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid, 3-(hydroxymethyl)-8-oxo-7-[2-(4-pyridylthio)acetamido]-, acetate (ester) (8CI);5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid, 3-[(acetyloxy)methyl]-8-oxo-7-[[(4-pyridinylthio)acetyl]amino]-, (6R-trans)-;7-[2-(4-Pyridylthio)acetamido]cephalosporanic acid;Cefaprin;C06896;(6R,7R)-3-[(Acetyloxy)Methyl]-8-oxo-7-[[(4-pyridinylthio)acetyl]aMino]-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid;(6R-trans)-3-[(Acetyloxy)Methyl]-8-oxo-7-[[(4-pyridinylthio)acetyl]aMino]-