tert-butyl (1S,6R,7R)-3-bromomethyl-7-formamido-1-oxo-3-cephem-4-carboxylate 、
4-Methyl-5,6-dioxo-3-thioxo-hexahydro-1,2,4-triazin 生成 tert-butyl (6R,7R)-7-amino-3-[(4-methyl-5,6-dioxo-1H-1,2,4-triazin-3-yl)sulfanylmethyl]-5,8-dioxo-5λ4-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate