、 3-[(2S,4S)-4-hydroxy-2-hydroxymethylpyrrolidin-1-yl]propionitrile 、
N,N-二乙基-2,3-二甲基苯甲酰胺 以3-(2-[(2S,4S)-4-hydroxy-2-hydroxymethylpyrrolidin-1-yl]ethyl)-5-methyl-2H-isoquinolin-1-one is obtained的产率得到3-{2-[(2S,4S)-4-hydroxy-2-hydroxymethylpyrrolidin-1-yl]ethyl)-5-methyl-2H-isoquinolin-1-one