p-nitrobenzyl (2R,4R,5S,6S)-6-[1'(R)-hydroxyethyl]-4-methyl-3,7-dioxo-1-azabicyclo[3.2.0]heptan-2-carboxylate 、
7-(2-Formylaminoethyl)thio-2-(tri-n-butylstannyl)imidazo[5,1-b]thiazole 生成 4-Nitrobenzyl (1S,5R,6S)-2-[7-(2-formylamino-ethyl)thioimidazo[5,1-b]thiazol-2-yl]-6-((1R)-1-hydroxyethyl)-1-methyl-1-carbapen-2-em-3-carboxylate