5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2- carboxylic acid,3-[(acetyloxy)methyl]-7-[[(2Z)- (2-amino-4-thiazolyl)[(carboxymethoxy)imino]- acetyl]amino]-8-oxo-,disodium salt,(6R,7R)-
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