2-(R)-(3-(R)-formyl-4-(S)-phenylpyrrolidin-1-yl)-2-(cyclohexyl)acetic acid,4-methoxybenzyl ester 、
4-((N-benzylcarbamoyl)oxy)-piperidine trifluoroacetate 以17 mg (64%)的产率得到2-(R)-(3-(S)-(4-((N-Benzylcarbamoyl)oxy)-piperidin-1-yl)methyl-4-(S)-phenyl pyrrolidin-1-yl)-2-(cyclohexyl)acetic acid