乙酸酐 、
2-Acetylamino-3-[2-((2R,3S,4R,5S,6R)-3,4,5-trihydroxy-6-hydroxymethyl-tetrahydro-pyran-2-yl)-1H-indol-3-yl]-propionic acid ethyl ester 在
吡啶 作用下,
生成 2-Acetylamino-3-[2-((2R,3R,4R,5R,6R)-3,4,5-triacetoxy-6-acetoxymethyl-tetrahydro-pyran-2-yl)-1H-indol-3-yl]-propionic acid ethyl ester