(2S)-N-(cyanomethyl)-2-{[(R)-{4-[1-(2-methoxyethyl)piperidin-4-yl]phenyl}(phenyl)methyl]oxy}-4-methylpentanamide 、
methanol+acetone 以to give the title compound after chromatography with 50% methanol/acetone的产率得到(2S)-2-{[(R)-{4-[1-(2-methoxyethyl)-1-oxidopiperidin-4-yl]phenyl}(phenyl)methyl]oxy}-4-methylpentanamide