4-nitrobenzyl (7R,8S)-8-[(1R)-1-(tert-butyldimethylsilyloxy)ethyl]-5-methanesulphonyl-9-oxo-1-azabicyclo[5.2.0]non-2,4-diene-2-carboxylate                                                                                                                                                                                                                                                                                                          生成                                                 
4-nitrobenzyl (7R,8S)-8-[(1R)-1-hydroxyethyl]-5-methanesulphonyl-9-oxo-1-azabicyclo [5.2.0]non-2,4-diene-2-carboxylate