(6R)-7t-((R)-2-formylamino-2-phenyl-acetylamino)-3-methyl-8-oxo-(6rH)-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid                                                                                                                                                              在
                                                                                                                                                                                 
吡啶   、                                                                                                  
三氯氧磷                                                                                                                                  作用下,
                                                                                                                                                                                                                            生成                                                 (6
R)-7
t-((Ξ)-2-isocyano-2-phenyl-acetylamino)-3-methyl-8-oxo-(6
rH)-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid