benzenesulfonic acid 4-[4-phenylsulfonyloxy-2-(pyrido[2,3-d]pyrimidin-4-ylamino)-cyclohexa-1,3-dienylsulfanyl]-phenyl ester   、                                                                                      
三氟乙酸                                                                                                                                                                                                                                                                                                          生成                                                 benzenesulfonic acid 4-[4-phenylsulfonyloxy-2-(pyrido[2,3-d]pyrimidin-4-ylamino)-cyclohexa-1,3-dienylsulfanyl]-phenyl ester trifluoroacetate