2,2',4,4'-tetramethoxybenzil

(4,2',4'-trimethoxy-α,α'-dioxo-bibenzyl-2-yloxy)-acetic acid

3-bromo-2,3-dihydro-7-methoxy-4H-1-benzopyran-4-one

4H-1-苯并吡唑-4-酮

7-methoxy-3-phenylthio-2,3-dihydro-(4H)-benzopyran-4-one