4H-1-Benzopyran-4-one, 6-(2,3-dihydroxy-3-methylbutyl)-3-(2,4-dihydroxyphenyl)-5,7-dihydroxy- 4H-1-Benzopyran-4-one, 6-(2,3-dihydroxy-3-methylbutyl)-3-(2,4-dihydroxyphenyl)-7-hydroxy- 91681-63-9