p-toluenesulfonyl chloride
3,5,8-trimethoxy-2-(4-methoxy-phenyl)-7-(toluene-4-sulfonyloxy)-chromen-4-one
7-hydroxy-3,4',5,8-tetramethoxyflavone
5,7-dihydroxy-3,8-dimethoxy-2-(4-methoxy-phenyl)-chromen-4-one
3,4',8-trimethoxy-5,7-bis(tosyloxy)flavone