乙酸酐 、
(2S,3R,4E)-3-benzyloxy-1-(2,3,4,6-tetra-O-benzyl-5a-carba-β-D-glucopyranosyloxy)-2-(p-tolylsulfonylamino)-4-octadecene 在
吡啶 、
sodium 作用下,
生成 (2S,3R,4E)-2-acetamido-3-acetoxy-1-(2,3,4,6-tetra-O-acetyl-5a-carba-β-D-glucopyranosyloxy)-4-octadecene