Fmoc-Asn(Trt)-OSu 、 (2,5-dioxopyrrolidin-1-yl) (2S)-2-azidopropanoate 、 (2R,3R)-3-methyl-2-[(2-methylpropan-2-yl)oxycarbonylamino]pent-4-enoic acid 、
Fmoc-L-烯丙基甘氨酸 以82%的产率得到methyl (2S)-2-[[(2S)-2-[[(2S)-2-[[(2R,3R)-3-methyl-2-[[(2S)-2-[[(2R,3R)-3-methyl-2-[(2-methylpropan-2-yl)oxycarbonylamino]pent-4-enoyl]amino]propanoyl]amino]pent-4-enoyl]amino]pent-4-enoyl]amino]-4-oxo-4-(tritylamino)butanoyl]amino]pent-4-enoate