3-ethyl-4,4,5-trimethyl-2(3-fluoroanilinocarbonyl)hydrazono-6-aminocarbonyl-hydrazonoheptane-3,4,4,5-tetracarboxylate                                                                                                                                                              在
                                                                                                                                                                                 
sodium methylate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                    反应 1.5h,
                                                                                                                以74%的产率得到N-(7-aminocarbonylamino-3,8-dimethyl-4-ethoxycarbonyl-9-methoxycarbonyl-1,6-dioxo-2,7-diazaspiro[4.4]nona-3,8-dien-2-yl)-N'-3-fluorophenylurea