4H-1-benzopyran-4-one, 2,3-dihydro-5-hydroxy-3-[(4-hydroxyphenyl)methyl]-7,8-dimethoxy- 5-hydroxy-3-(4-hydroxybenzyl)-7,8-dimethoxy-2,3-dihydro-4H-chromen-4-one InChI=1/C18H18O6/c1-22-14-8-13(20)15-16(21)11(9-24-18(15)17(14)23-2)7-10-3-5-12(19)6-4-10/h3-6,8,11,19-20H,7,9H2,1-2H