7-(phenylcarbonyl)oxy-2H-1-benzopyran-2-one

4-O-(2'-oxo-benzopyran-7'-yl)-D-threose

7'-(2,3,5-trihydroxy-4-oxo-pentyl)oxycoumarin

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

7-(2',3',5'-trihydroxy-4'-oxo-pentyl)oxycoumarin