(3R,4S)-1-benzyl-3-({[tert-butyl(dimethyl)silanyl]oxy}methyl)-4-(2-methylphenyl)pyrrolidine 、
6-Ethoxy-6-oxohexanoate 以obtained in Reference Example 127 which的产率得到6-[(3R,4S)-3-(([tert-butyl(dimethyl)silyl]oxy)methyl)-4-(2-methylphenyl)pyrrolidin-1-yl]-6-oxohexanoic acid ethyl ester