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