2-(3,4-dimethoxyphenyl)-5-hydroxy-3,6,7,8-tetramethoxychromen-4-one

2-[4-(acetyloxy)phenyl]-5,6,7,8-tetramethoxy-4H-1-benzopyran-4-one

2-(4-hydroxyphenyl)-5,6,7,8-tetrahydroxy-4H-1-benzopyran-4-one