正丁胺 、
(1R,4S,5S,1'S)-4-<1'-(N-benzyloxycarbonyl-L-asparaginyl)amino-2'-phenyl>ethyl-3-oxobicyclo<3.3.0>octan-2-one 反应 72.0h,
生成 (1R,2S,1'S,2'S)-2-<2'-(N-benzyloxycarbonyl-L-asparaginyl)amino-1'-hydroxy-3'-phenylpropyl>cyclopentane-1-carboxylic acid n-butylamide