6-溴苯并呋喃-3-羧酸乙酯

ethyl (1R,2R)-2-formylcyclopropane-1-carboxylate

ethyl 2-prop-2-enylsulfanylacetate

3-(2-ethylphenoxy)-3-oxopropanoic acid

ethyl 3-oxo-4-prop-2-enoxybutanoate