p-nitrobenzyl-6-(1-hydroxyethyl)-1-azabicyclo(3.2.0)heptane-3,7-dione-2-carboxylate Molecular Formula: C16H16N2O7 MW: 348.32 CAS　No: [74288-40-7] Appearance：power with white or alike color Mp: 109~114°C (decompound) [α]D20: ＋103~+108　(c=1,CHCl3) Moisture：≤0.5% assay: ≥96%(HPLC) Container：20kg/bucket Reposition：0~20℃[...]

(3R,4R)-4-acetoxy-3-[(1R)-1-t-butyldimethylsilyloxyethyl]azetidin-2-one. or [3R-[3α(R*),4β] ]-4-(acetyloxy)-3-[1-[[(1,1-dimethylethyl)dimethlsilyl]oxy] ethyl]azetidin-2-one Molecular Formula：C13H25NO4Si MW：287.43 CAS：[76855-69-1] Optical Purity：99% e e Assay：≥98.5% [α]D25: +46～+49°(c=0.98 CHCl3) Mp：104～108℃ Containing Water：≤0.2%[...]

(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. Molecular Formula：C14H27NO4Si MW：301.45 CAS No：[90776-58-2] Appearance: power with white or alike color Mp：146-147℃ [α]D20: +30～+35° Moisture：≤0.5% Assay：≥98% Container：20kg/bucket Reposition：-8~10℃[...]

PNB (4R,5S,6S)-3-(diphenyloxy)phosphoryloxy-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-1-azabicyclo[3,2,0]hept-2-ene-2-carboxylate. or PNB (1R,5S,6S)-2-(diphenyloxy)phosphoryloxy-6-[(1R)-1-hydroxyethyl]-1-methyl-1-carbapen-2-em-3-carboxylate. or [4R-[4α, 5β,6β(R*)] ]-3-[(diphenoxyphosphinyl)oxy] -6- (1-hydroxyethyl) -4- methyl -7- oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid,(4-nitrophenyl)methyl ester Molecular Formula：C29H27N2O10P MW：594.52 CAS No：[90776-59-3] Appearance: power[...]

(4R,5S,6S)- 4-nitrobenzyl-3-[[(3S,5S)-5-[(dimethylamino)carbonyl]-1-[[(4- nitrobenzyl) oxy] carbonyl] -3- pyrrolidinyl]thio] -6- [(1R) -1- hydroxyethyl] -4- methyl -7-oxo-1-azabicyclo[3,2,0]hept-2-ene-2-carboxylate or 3-[[5-[( dimethylamino)carbony pyrrolidinyl] thio] -6- (1-hydroxyethyl) -4- methyl -7- oxo -1- azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid, (4-nitrophenyl)methyl ester Molecular Formula：C32H35N5O11S; MW：697.71; CAS No：[96036-02-1] Appearance：power with white or alike[...]