4H-1-benzopyran-4-one, 2,3-dihydro-5,7-dihydroxy-3-[(3-hydroxy-4-methoxyphenyl)methyl]- 5,7-dihydroxy-3-(3-hydroxy-4-methoxybenzyl)-2,3-dihydro-4H-chromen-4-one InChI=1/C17H16O6/c1-22-14-3-2-9(5-12(14)19)4-10-8-23-15-7-11(18)6-13(20)16(15)17(10)21/h2-3,5-7,10,18-20H,4,8H2,1H