2-(R)-(3-(R)-Formyl-4-(S)-(phenyl)pyrrolidin-1-yl)-3-(cyclobutyl)propanoic acid, benzyl ester 、
4-(N-((2-chloro-4-fluorobenzyl)carbonyl)-N-ethylamino)piperidine trifluoroacetate 在
2-(R)-(3-(S)-(4-(N-((2-Chloro-4-fluorobenzyl)carbonyl)-N-ethylamino)-piperidin-1 yl)methyl-4-(S)-phenyl-pyrrolidin-1-yl)-3-(cyclobutyl)propionic acid 作用下,
以to give 6.0 mg (15%) of the title compound的产率得到2-(R)-(3-(S)-(4-(N-((2-Chloro-4-fluorobenzyl)carbonyl)-N-ethylamino)-piperidin-1 yl)methyl-4-(S)-phenyl-pyrrolidin-1-yl)-3-(cyclobutyl)propionic acid