1,1-Dimethylethyl 7-[2-(2-tritylaminothiazol-4-yl)-2-methoxyimino-acetamido]-3--(ethoxycarbonylmethylthio)-2-hydroxy-8-oxo-4-thia-1-azabicyclo[4,2,0]octane-2-carboxylate (HCID 54517944)|Huagongshe