4-Amino-benzoic acid 6-[4-(4-methoxy-phenylazo)-phenoxy]-hexyl ester   、                                                                                      
4-{11-[4-(4-Methoxy-phenylazo)-phenoxy]-undecyloxy}-benzaldehyde                                                                                                                                                              在
                                                                                                                                                                                 
对甲苯磺酸                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲苯                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 4-[(4-{11-[4-(4-methoxyphenylazo)phenoxy]undecyloxy}benzylidene)amino]benzoic acid 6-[4-(4-methoxyphenylazo)phenoxy]hexyl ester