3-(phenylthio)-(2,3,4H)-furo[2,3-h]-1-benzopyran

8-(2,2-Dimethoxy-ethyl)-7-hydroxy-chromen-2-one

2-(2-oxochromen-7-yl)oxyacetaldehyde

7-hydroxy-8-prop-2-enylchromen-2-one

7-hydroxy-8-iodochromen-2-one