6-hydroxy-4,7-dimethoxy-5-acetoacetylbenzofuran

4,9-Dihydroxy-7-methyl-5H-furo[3,2-g][1]benzopyran-5-one

5-norvisnagin

乙酸乙酯

7-methylfuro[3,2-g]chromene-4,5,9-trione