3,3-二甲基环氧乙烷-2-羧酸乙酯

3,5-二碘吡啶

Ethyl 6-methyl-1-benzofuran-2-carboxylate

ethyl 7-acetyl-6-hydroxy-3-methyl-1-benzofuran-2-carboxylate

4-羟基-2-吡啶羧酸乙酯