6-甲基-2,4-庚二酮

4-苯基-3-丁炔-2-酮

trimethyl(1-propan-2-yloxyethenoxy)silane

(R)-methyl 2-(3-acetoxy-5-oxocyclopent-1-en-1-yl)acetate

methyl 2-[(3R)-3-hydroxy-5-oxocyclopenten-1-yl]acetate