(5-hydroxy-8-methoxy-2-methyl-4-oxo-4H-chromen-7-yloxy)-acetic acid methyl ester

(6-formyl-5-hydroxy-8-methoxy-2-methyl-4-oxo-4H-chromen-7-yloxy)-acetic acid methyl ester

6-benzyloxy-4,7-dimethoxy-benzofuran-2-carboxylic acid ethyl ester

(6-formyl-5,8-dimethoxy-2-methyl-4-oxo-4H-chromen-7-yloxy)-acetic acid methyl ester

6-acetyl-4,9-dimethoxy-7-methylfuro[3,2-g]chromen-5-one