tert-butyl (2S)-4-[[(2R,3R,4R,5S,6R)-3-acetamido-5-[(2S,3R,4R,5S,6R)-3-acetamido-4,5-diacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-4-acetyloxy-6-[[(2R,3S,4R,5R,6S)-3,4,5-triacetyloxy-6-methyloxan-2-yl]oxymethyl]oxan-2-yl]amino]-2-amino-4-oxobutanoate 、
Aloc-Ala-Leu-OH 以98%的产率得到