(6R,7R)-3-[(acetyloxy)methyl]-8-oxo-7-{[(pyridin-4-ylsulfanyl)acetyl]amino}-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid - N,N'-dibenzylethane-1,2-diamine (2:1) [ 97468-37-6 ]