2-乙酰基呋喃

dimethyl (1R,2R,4S,5S)-3-cyanotricyclo[3.2.2.02,4]nona-6,8-diene-6,7-dicarboxylate

(3aR,4R,7S,7bS)-dimethyl 2,2-dimethyl-3a,3b,4,7,7a,7b-hexahydro-4,7-ethenobenzo[3,4]cyclobuta[1,2-d][1,3]dioxole-5,6-dicarboxylate

4-methoxycarbonyl-3a,4-dihydrophthalide

甲基丙烯酸酯