{benzyloxycarbonyl-[3-(benzyloxycarbonyl-{4-[benzyloxy-carbonyl-(3-benzyloxycarbonylaminopropyl)-amino]-butyl}-amino)-propyl]-amino}-acetic acid 、
Acetic acid (2R,3S,4S,5R,6R)-3,5-diacetoxy-2-acetoxymethyl-6-(15-octadecylamino-pentadecyloxy)-tetrahydro-pyran-4-yl ester 在
(benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate 、
N,N-二异丙基乙胺 作用下,
以
氯仿 为溶剂,
以83%的产率得到[(2R,3S,4S,5R,6R)-3,4,5-triacetyloxy-6-[15-[octadecyl-[2-[phenylmethoxycarbonyl-[3-[phenylmethoxycarbonyl-[4-[phenylmethoxycarbonyl-[3-(phenylmethoxycarbonylamino)propyl]amino]butyl]amino]propyl]amino]acetyl]amino]pentadecoxy]oxan-2-yl]methyl acetate