乙基亚基三乙酸酯

5-羟基-4-甲基-2H-1-苯并吡喃-2-酮

3-acetyl-5-hydroxy-2-methylchromen-4-one

2-(乙酰基硫代)乙酰苯胺

(9-acetyloxy-7-oxofuro[3,2-g]chromen-4-yl) acetate