5-Thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid, 7-((2-(2-amino-4-thiazolyl)-4-carboxy-1-oxo-2-butenyl)amino)-8-oxo-, disodium salt, (6R-(6-alpha,7-beta(Z)))- 7432-S sodium salt 97518-16-6