tert-butyl (2-(8-(cyclopentyloxy)-7-methyl-2,4-dioxo-3,4-dihydrobenzo[g]pteridin-10(2H)-yl)ethyl)(2-(trifluoromethyl)benzyl)carbamate   、                                                                                      
三氟乙酸                                                                                                                                                              在
                                                                                                                                                                                 
8-(cyclopentyloxy)-7-methyl-10-(2-((2-(trifluoromethyl)benzyl)amino)ethyl)benzo[g]pteridine-2,4(3H,10H)-dione trifluoroacetate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 2.0h,
                                                                                                                以The desired product 8-(cyclopentyloxy)-7-methyl-10-(2-((2-(trifluoromethyl)benzyl)amino)ethyl)benzo[g]pteridine-2,4(3H,10H)-dione 2,2,2-trifluoroacetic acid salt (12.4 mg, 71%) is obtained as a bright yellow solid的产率得到8-(cyclopentyloxy)-7-methyl-10-(2-((2-(trifluoromethyl)benzyl)amino)ethyl)benzo[g]pteridine-2,4(3H,10H)-dione trifluoroacetate