5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid,3-[[2-[[(2-aminoethyl)thio]methyl]-3-pyridinyl]thio]-7-[[(2Z)-(5-amino-1,2,4-thiadiazol-3-yl)(hydroxyimino)acetyl]amino]-8-oxo-, (6R,7R)-