Molecular Formula: C17H16N3O6S2.Na Formula Weight: 445.45
3-[(Acetyloxy)methyl]-8-oxo-7-{(4-pyridinylthio)acetyl]amino}-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid monosodium salt;Cefapirin sodium;Cephapirin sodium