1-(1,3-二氧代丁基)吡咯烷

S-phenyl 3-oxobutanethioate

ethyl 2-(4-methyl-2-oxochromen-7-yl)oxyacetate

7-hydroxy-4,5-dimethylchromen-2-one

2-(羟基甲基)-2,6-二甲基-4H-1,3-二恶英-4-酮