4-nitrobenzyl 6-(2-[4-nitrobenzyloxycarbonylamino]-2-[4-iodomethoxycarbonyloxyphenyl]acetamido)penicillanate   、                                                                                      
tetrabutylammonium 6-beta-hydroxymethylpenicillanate 1,1-dioxide                                                                                                                                                                                                                                                                                                          生成                                                 4-Nitrobenzyl 6-(2-[4-Nitrobenzyloxycarbonylamino]-2-[4-(1,1-dioxo-6-beta-hydroxymethylpenicillanoyloxymethoxycarbonyloxy)phenyl]acetamido)penicillanate