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cas no:n/a||chemical formula:c7h7cln2o4s||molecular weight:250.65300||exact mass:249.98151||(6r,7r)-7-amino-3-chloro-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2……

cas no:n/a ||chemical formula:c22h19n3o7s ||molecular weight:469.46800 ||exact mass:469.09437"||3-hydroxy-7-(n-(3-nitrobenzyl)-2-phenylacetamido)-8-oxo-5-thia-1……

cas no:n/a||chemical formula:c23h23n3o6s||molecular weight:469.51200||exact mass:469.13076||3-nitrobenzyl3,3-dimethyl-7-oxo-6-(2-phenylacetamido)-4-thia-1-azabi……

cas no:n/a||chemical formula:c23h21n3o5s||molecular weight:451.49700||exact mass:451.12019||3-nitrobenzyl 2-(3-benzyl-7-oxo-4-thia-2,6-diazabicyclo[3.2.0]hept-2……

cas no:n/a||chemical formula:c22h19n3o6s ||molecular weight:453.46900||exact mass:453.09946 ||3-nitrobenzyl(z)-2-(3-benzyl-7-oxo-4-thia-2,6-diazabicyclo[3.2.0]h……