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Intermediates-For Penem & Carbapenem 3-(2-Bromo-1-oxopropyl)-spiro-[2H-1,3-benzoxazine- 2,1'-lohexan]-4(3H)-one   CAS No.       : [158299-05-9]   Abbr             : Br-Comp   Application :  Meropenem   Spec .           : 98.0%