上游原料
benzhydryl (2S,3R)-3-(chloromethyl)-3-methyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylatebenzhydryl (2S,3S)-3-(azidomethyl)-3-methyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylatebenzhydryl (2S,3S)-3-(azidomethyl)-3-methyl-4,4,7-trioxo-4lambda(6)-thia-1-azabicyclo[3.2.0]heptane-2-carboxylateethynyl(trimethyl)silane；trimethylsilyl acetylenebenzhydryl (2S,3S)-3-methyl-4,4,7-trioxo-3-[[4-(trimethylsilyl)-1H-1,2,3-triazol-1-yl]methyl]-4lambda(6)-thia-1-azabicyclo[3.2.0]heptane-2-carboxylatebenzhydryl (2S,3S)-3-methyl-4,4,7-trioxo-3-(1H-1,2,3-triazol-1-ylmethyl)-4lambda(6)-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate(2S,3S)-3-((1H-1,2,3-triazol-1-yl)methyl)-3-methyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid 4,4-dioxide
