乙酸酐 、
地黄苷 在
吡啶 作用下,
生成 (E)-3-(4-Acetoxy-3-methoxy-phenyl)-acrylic acid (2R,3R,4S,5R,6R)-5-acetoxy-6-[2-(3-acetoxy-4-methoxy-phenyl)-ethoxy]-2-acetoxymethyl-4-((2S,3R,4R,5S,6S)-3,4,5-triacetoxy-6-methyl-tetrahydro-pyran-2-yloxy)-tetrahydro-pyran-3-yl ester