4-BMA MAP Side chain for meropenem(2S-CIS) Faropenem,Fropenem Side chain for biapenem Side chain for ertapenem P-Toluenesulfonyl azide or 4-Methylbenzenesulfonyl azide P-Dodecylbenzenesulfonyl azide or 4-Dodecylbenzenesulfonyl azide 4'-Methylbenzylidene camphor(MBC 95) Diphenyl chlorophosphate or Diphenyl phosphorochloridate or Phosphorochloridic acid,diphenyl ester Diphenyl phosphorazidate 3-(2-Bromo-1-oxopropyl)-spiro[2H-1,3-benzoxazine-2,1'-cyclohexan]-4(3H)-one (2S,4R)-2-carboxylic-4-hydroxy-1-(p-nitrobenzyloxycarbonyl)-1-pyrrolidine(Intermaterial of the side for penem)

1. 4-BMA美罗培南母核（β-methylazetidin-2-one） Chemical Name: (3S,4S)-4-[(R)-1-carboxyethyl]-3-[(R)-1-(t-butyldimethylsilyloxy)ethyl]-2-azetidinone. or [2R-[2α(R*),3β(R*)] ]-3-[1-[[(1,1-dimethylethyl)dimethylsilyl]oxy]ethyl]-α-methl-4- oxo-2-azetidineacetic acid. CAS： 90776-58-2 Molecular Formula: C14H27NO4Si MW: 301.45 Mp: 146-147℃ [α]D20: +30～+35° Moisture： ≤0.5% Assay： ≥96% Container： 20kg/bucket Reposition： -8~10℃ Structural：

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