benzyl 6α-(4-nitrobenzenesulfonyloxymethyl)-6β-(4-nitrobenzylideneamino)penicillanate                                                                                                                                                              在
                                                                                                                                                                                 lithium iodide                                                                                                                                  作用下,
                                                                                                                                                                                                                            生成                                                 benzyl 6α-iodomethyl-6β-(4-nitrobenzylideneamino)penicillanate   、                                                                                             
(5R)-6c-iodomethyl-3,3-dimethyl-7-oxo-6t-(2-phenoxy-acetylamino)-(5rH)-4-thia-1-aza-bicyclo[3.2.0]heptane-2c-carboxylic acid benzyl ester