3-(Hydroxymethyl)-8-oxo-7-((2-(4-pyridylthio)acetyl)amino)-5-thia-1-azabicyclo(4.2.0)oct-2-ene-carboxylic acid 38115-21-8 5-Thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid, 3-(hydroxymethyl)-8-oxo-7-(((4-pyridinylthio)acetyl)amino)-, (6R-trans)- Desacetyl cephapirin Desacetylcephapirin