上游原料
methyl 3-oxobutanoate; Methyl acetoacetate2-Propen-1-ol; Allyl alcoholallyl 3-oxobutanoatep-Toluenesulfonyloxy azide2-Diazo-3-oxobutyric acid allyl estertert-butyl(dimethyl)silyl trifluoromethanesulfonate2-Diazo-3-(tert-butyldimethylsilyloxy)-3-butenoic acid allyl ester(3R)-3-((1R)-1-[[tert-butyl(dimethyl)silyl]oxy]ethyl)-4-oxoazetidinyl acetate4-[3(S)-[1(R)-(Tert-butyldimethylsilyloxy)ethyl]-4-oxoazetidin-2(R)-yl]-2-diazo-3-oxobutyric acid allyl esterallyl (5R,6S)-6-[(1R)-1-hydroxyethyl]-3,7-dioxo-1-azabicyclo[3.2.0]heptane-2-carboxylate2-pyridinylmethylhydrosulfide; 2-pyridinylmethanethiolallyl (5R,6S)-6-[(1R)-1-hydroxyethyl]-7-oxo-3-[(2-pyridinylmethyl)sulfanyl]-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate(5R,6S)-6-[(1R)-1-hydroxyethyl]-7-oxo-3-[(2-pyridinylmethyl)sulfanyl]-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate2-pyridinylmethylhydrosulfide; 2-pyridinylmethanethiol4-nitrobenzyl (5R,6S)-6-[(1R)-1-hydroxyethyl]-3,7-dioxo-1-azabicyclo[3.2.0]heptane-2-carboxylate4-nitrobenzyl (5R,6S)-6-[(1R)-1-hydroxyethyl]-7-oxo-3-[(2-pyridinylmethyl)sulfanyl]-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate2-[[((5R,6S)-6-[(1R)-1-hydroxyethyl]-2-[[(4-nitrobenzyl)oxy]carbonyl]-7-oxo-1-azabicyclo[3.2.0]hept-2-en-3-yl)sulfanyl]methyl]-1-methylpyridinium iodide
