10-oxo-7,10-dihydro-pyrido[3,2-f]quinoxaline-9-carboxylic acid 2,5-dioxo-pyrrolidin-1-yl ester   、                                                                                      
cephaloglycine                                                                                                                                                                                                                                                                                                          生成                                                 sodium;(6R,7R)-3-(acetyloxymethyl)-8-oxo-7-[[2-[(10-oxo-7H-pyrido[3,2-f]quinoxaline-9-carbonyl)amino]-2-phenylacetyl]amino]-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate