三氟乙酸 、
(S)-2-((2S,3R)-3-tert-Butoxycarbonylamino-2-hydroxy-5-trimethylsilanyl-pentanoylamino)-4-methyl-pentanoic acid tert-butyl ester 以91%的产率得到(S)-2-((2S,3R)-3-Amino-2-hydroxy-5-trimethylsilanyl-pentanoylamino)-4-methyl-pentanoic acid; compound with trifluoro-acetic acid