4-BMA (Intermediate of Meropenem ) :
   Chemical Name : (3S,4S)-4-[(R)-1-carboxy-ethyl]-3-[(R)-1-(t-butyldimethylsilyloxy)ethyl]-2-azetidinone
    CAS No. : 90776-58-2
    Molecular formula : C₁₄H₂₇NO₄Si
    Molecular weight : 301.45
    Standard : company standard

  
  MAP or MVP (Intermediate of Meropenem) :
  Chemical Name : PNB(4R,5S,6S)-3-(diphenyl-oxy)phosphoryloxy-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-1-azabicyclo[3,2,0]hept-2-ene-2-carboxylate.
   CAS No. : 90776-59-3
   Molecular formula : C₂₉H₂₇N₂O₁₀P
   Molecular weight : 594.52
   Standard : company standard