Toluene-4-sulfonic acid 6-hydroxy-5,7,8-trimethoxy-2-(4-methoxy-phenyl)-4-oxo-4H-chromen-3-yl ester

3,5-dihydroxy-6,7,8-trimethoxy-2-(4-methoxy-phenyl)-chromen-4-one

Toluene-4-sulfonic acid 5,6,7-trihydroxy-8-methoxy-2-(4-methoxy-phenyl)-4-oxo-4H-chromen-3-yl ester

Toluene-4-sulfonic acid 5,6-dihydroxy-7,8-dimethoxy-2-(4-methoxy-phenyl)-4-oxo-4H-chromen-3-yl ester

Toluene-4-sulfonic acid 5-hydroxy-6,7,8-trimethoxy-2-(4-methoxy-phenyl)-4-oxo-4H-chromen-3-yl ester