5-pentyl-pyridine-2-carboxylic acid (4-bromo-benzyl)-piperidin-4-yl-amide trifluoroacetate 、 4-[(4-methoxycarbonyl-benzyl)-(5-pentyl-pyridine-2-carbonyl)amino]-piperidine-1-carboxylic acid tert-butyl ester 以to give 1.95 g (quantitative yield) of 4-{[(5-pentyl-pyridine-2-carbonyl)-piperidin-4-yl-amino]-methyl}-benzoic acid methyl ester trifluoroacetate (78)的产率得到4-{[(5-pentyl-pyridine-2-carbonyl)-piperidin-4-yl-amino]-methyl}-benzoic acid methyl ester trifluoroacetate