methyl 2,5-dimethylpyridine-3-carboxylate

3-methoxy-4-pent-4-enyl-2H-furan-5-one

2-but-3-enyl-3-methoxy-2H-furan-5-one

6-羟基-2-甲基苯并呋喃-3-羧酸甲酯

methyl 2-(2-methoxy-2-oxoethyl)selanylacetate