3,4-呋喃二羧酸二甲酯

4-methoxycarbonyl-2-oxatricyclo[6.2.2.01,5]dodeca-4,6,9,11-tetraen-3-one

(6S,6aR,7R,10S,10aS,10bS)-trimethyl 2-oxo-2,6,6a,7,10,10a-hexahydro-7,10-epoxy-6,10b-ethenobenzo[6,7]cyclohepta[1,2-b]furan-3,8,9-tricarboxylate

甲基1-薁羧酸酯

methyl 2,3-dihydroazuleno[1,2-b]thiophene-4-carboxylate