胡椒乙胺 、 methyl 4-(4-chloro-6-nitrothieno[2,3-d]pyrimidin-2-yl)benzoate 以yields 4-[4-(3,4-methylenedioxyphenethylamino)-6-nitro-thieno-[2,3-d]-pyrimidin-2-yl]-benzoic acid methylester的产率得到methyl 4-[4-(3,4-methylenedioxyphenethylamino)-6-nitro-thieno-[2,3-d]-pyrimidin-2-yl]-benzoate