上游原料
(2R,3R)-3-((1R)-1-[[tert-butyl(dimethyl)silyl]oxy]ethyl)-4-oxoazetanyl acetateethyl ethanimidoatebenzyl (Z)-3-(1-pyrrolidinyl)-2-butenoatebenzyl (Z)-4-[(2R,3S)-3-((1R)-1-[[tert-butyl(dimethyl)silyl]oxy]ethyl)-4-oxoazetidinyl]-3-(1-pyrrolidinyl)-2-butenoatebenzyl 4-[(2R,3S)-3-[(1R)-1-hydroxyethyl]-4-oxoazetidinyl]-3-oxobutanoate2-Diazo-4-[3(S)-(1(R)-hydroxyethyl)-4-oxoazetidin-2(R)-yl]-3-oxobutyric acid benzyl esterbenzyl (5R,6S)-6-[(1R)-1-hydroxyethyl]-3,7-dioxo-1-azabicyclo[3.2.0]heptane-2-carboxylate4-nitrobenzyl (3S)-3-sulfanyl-1-pyrrolidinecarboxylatebenzyl (5R,6S)-6-[(1R)-1-hydroxyethyl]-3-[[(3S)-1-(4-nitrobenzyl)pyrrolidinyl]sulfanyl]-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate(5R,6S)-6-[(1R)-1-hydroxyethyl]-7-oxo-3-[(3S)pyrrolidinylsulfanyl]-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid
