cas no:96752-43-1，3432-88-0||chemical formula:c13h13n3o3s||molecular weight:291.32500||exact mass:291.06776||(6r,7r)-7-amino-8-oxo-3-(pyridin-1-ium-1-ylmethyl)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate
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