methyl 7-(5-methyl-2,4-dioxotetrahydrofuran-3-yl)heptanoate

3-(6-carbomethoxyhexyl)-5-methyl-4-N-pyrrolidinofuran-2(5H)-one

7-甲氧基-7-氧代庚酸

5-甲基四氢呋喃-2,4-二酮

2,2-dimethyl-6-(5-methoxycarbonylpentyl)-4H-1,3-dioxin-4-one