Allyl 2-(2,2-dimethyl-3a,6a-di-hydro-furo[3,2-d][1,3]dioxol-5-yl)-4-oxo-4H-chromene-3-carboxyl-ate.

2-(2,2-二甲基-3a,6a-二氢呋喃并[3,2-d][1,3]二氧杂环戊烯-5-基)-4-氧代-4H-色烯-3-羧酸烯丙酯