上游原料
1-(chloromethyl)-4-nitrobenzene(2R)-1-[tert-butyl(dimethyl)silyl]-4-oxo-2-azetidinecarboxylic acid(4R)-1-[tert-butyl(dimethyl)silyl]-4-(hydroxymethyl)-2-azetidinone5-Mercapto-1-methyl-1H-tetrazole; 1-Methyl-1H-1,2,3,4-tetraazol-5-ylhydrosulfide(4R)-1-[tert-butyl(dimethyl)silyl]-4-[[(1-methyl-1H-1,2,3,4-tetraazol-5-yl)sulfanyl]methyl]-2-azetidinone(4R)-4-[[(1-methyl-1H-1,2,3,4-tetraazol-5-yl)sulfanyl]methyl]-2-azetidinoneN-methyl(4-nitrophenyl)methanamine1-[[(chlorocarbonyl)(methyl)amino]methyl]-4-nitrobenzene