[(2R,3R,4R)-3-benzoyloxy-4-fluoro-5-hydroxy-4-methyl-5-(4-methylsulfanylthieno[3,4-d]pyrimidin-7-yl)oxolan-2-yl]methyl benzoate 、
乙酸酐 在
吡啶 作用下,
生成
[(2R,3R,4R)-5-acetyloxy-3-benzoyloxy-4-fluoro-4-methyl-5-(4-methylsulfanylthieno[3,4-d]pyrimidin-7-yl)oxolan-2-yl]methyl benzoate