1-((2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-4-((6-methylpyridin-2-yl)oxy)pyrimidin-2(1H)-one

2,3,5-tri-O-acetylribofuranose

1-trimethylsilylpyrimidine-2,4-dione

乙酰氯