ethyl 8-(((trifluoromethyl)sulfonyl)oxy)-1,4-dioxaspiro[4.5]dec-7-ene-7-carboxylate

4-氧代庚二酸二乙酯

8-氧代-1,4-二噁螺[4.5]癸烷-7-羧酸乙酯

ethyl 3-[2-(3-ethoxy-3-oxopropyl)-1,3-dioxolan-2-yl]propanoate

1,4-环己二酮单乙二醇缩酮