乙酸酐 、
(2R,3R,4S,5S,6R)-2-[1-(2-Hydroxy-ethyl)-allyloxy]-6-hydroxymethyl-tetrahydro-pyran-3,4,5-triol 在
吡啶 作用下,
生成 Acetic acid (2R,3R,4S,5R,6R)-3,5-diacetoxy-2-[(S)-1-(2-acetoxy-ethyl)-allyloxy]-6-acetoxymethyl-tetrahydro-pyran-4-yl ester 、 Acetic acid (2R,3R,4S,5R,6R)-3,5-diacetoxy-2-[(R)-1-(2-acetoxy-ethyl)-allyloxy]-6-acetoxymethyl-tetrahydro-pyran-4-yl ester