5-Amino-4-benzoyl-3-nitrobenzoesaeure   、                                                                                      
5-Amino-4-(4'-chlorbenzoyl)-3-nitrobenzoesre                                                                                                                                                                                                                                                                                                          以4-(4'-chlorobenzoyl)-3-hydroxy-5-nitrobenzoic acid is obtained as a hemihydrate with a melting point of 266.5°-267.5° C.的产率得到4-(4'-Chlorbenzoyl)-3-hydroxy-5-nitro-benzoesaeure