(6R-trans)-3-(Acetoxymethyl)-8-oxo-7-(2-(4-pyridylthio)acetamido)-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid, compound with N,N'-dibenzylethylenediamine 66163-79-9 EINECS 266-205-4