N-<(2RS,2'S)-2-<2-(tert-butoxycarbonylamino)-5-hydroxypentyloxy>propanoyl>-L-alanyl-D-isoglutamine benzyl ester 、
三氟乙酸 反应 0.25h,
以92%的产率得到benzyl (4R)-5-amino-4-[[(2S)-2-[2-[(2S)-2-amino-5-hydroxypentoxy]propanoylamino]propanoyl]amino]-5-oxopentanoate;2,2,2-trifluoroacetic acid