(3R,Rs)-3-<(p-tolylsulfinyl)acetoxymethyl>butan-4-olide

ethyl 3-(2,2-dimethyl-1,3-dioxan-5-yl)prop-2-enoate

乙酸钾

(S)-4-bromomethyl-dihydrofuran-2-one

3-(hydroxymethyl)-2H-furan-5-one