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![4-Nitrobenzyl 2-((1R,5R)-3-benzyl-7-oxo-4-thia-2,6-diazabicyclo-[3.2.0]hept-2-en-6-yl)-3-methylbut-2-enoate,CAS No. 192049-49-3.  4-Nitrobenzyl 2-((1R,5R)-3-benzyl-7-oxo-4-thia-2,6-diazabicyclo-[3.2.0]hept-2-en-6-yl)-3-methylbut-2-enoate,CAS No. 192049-49-3.](https://public.whmall.com/system/0/chemical/image/2007/09/04/1188888888-3332341_C23H21N3O5S.png) 
  4-Nitrobenzyl 2-((1R,5R)-3-benzyl-7-oxo-4-thia-2,6-diazabicyclo-[3.2.0]hept-2-en-6-yl)-3-methylbut-2-enoate CAS No.192049-49-3 / Cat No.EBD3332341