2-呋喃-2-基-3H-苯并咪唑-4-羧酸

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

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

(-)-3β-hydroxy-1β-methoxycarbonylmethylcyclopent-1-en-5-one

4,7-二氧代-7-(4-甲氧基苯基)庚酸乙酯