5-methoxy-2-(methoxymethyl)-1-methylpyridin-4-one

2-[anilino(phenyl)methyl]-3-hydroxy-6-(hydroxymethyl)pyran-4-one

(5-methylsulfonyloxy-4-oxopyran-2-yl)methyl methanesulfonate

5-ethoxy-2-(hydroxymethyl)pyran-4-one

6-溴-5-羟基-2-羟基甲基-4-吡喃酮