2-(Trimethylsilyl)ethyl 3-{[(5-ethoxy-5-oxopentanoyl)(pyridin-3-yl)amino]methyl}benzoate 、
四丁基氟化铵 以160 mg of 3-{[(5-ethoxy-5-oxopentanoyl)(pyridin-3-yl)amino]methyl}benzoic acid was obtained by the method similar to Preparation Example 22的产率得到3-{[(5-ethoxy-5-oxopentanoyl)(pyridin-3-yl)amino]methyl}benzoic acid