上游原料
(2R,3R)-3-((1R)-1-[[tert-butyl(dimethyl)silyl]oxy]ethyl)-4-oxoazetanyl acetate(2R,3R)-3-((1R)-1-[[tert-butyl(dimethyl)silyl]oxy]ethyl)-4-oxoazetidinyl benzoateS-[(2R,3S)-3-((1R)-1-[[tert-butyl(dimethyl)silyl]oxy]ethyl)-4-oxoazetidinyl] 2-[(aminocarbonyl)oxy]ethanethioate(acetoxy)methyl 2-[(2R,3S)-2-([2-[(aminocarbonyl)oxy]acetyl]sulfanyl)-3-(1-[[tert-butyl(dimethyl)silyl]oxy]ethyl)-4-oxoazetidinyl]-2-oxoacetate(acetoxy)methyl 2-((2R,3S)-2-([2-[(aminocarbonyl)oxy]acetyl]sulfanyl)-4-oxo-3-[1-[(trimethylsilyl)oxy]ethyl]azetidinyl)-2-oxoacetate(acetoxy)methyl (2S,5R)-6,6-dibromo-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate(acetoxy)methyl (2S,5R,6S)-6-bromo-6-[(1R)-1-hydroxyethyl]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate(acetoxy)methyl (2S,5R,6S)-6-[(1R)-1-hydroxyethyl]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate(acetoxy)methyl (2S,5R,6S)-3,3-dimethyl-7-oxo-6-[(1R)-1-[(trimethylsilyl)oxy]ethyl]-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate(acetoxy)methyl 2-[(2R,3S)-2-([2-[(aminocarbonyl)oxy]acetyl]sulfanyl)-3-[(1R)-1-methyl-2-(trimethylsilyl)ethyl]-4-oxoazetidinyl]-3-methyl-2-butenoate(2S,5R,6R)-6-amino-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid; (+)-6-Aminopenicillanic acid; 6-APA2-[(aminocarbonyl)oxy]ethanethioic S-acid[(2-chloro-2-oxoacetyl)oxy]methyl acetatesodium 3-{[(aminocarbonyl)oxy]methyl}-6-(1-hydroxyethyl)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate