InChI=1S/C15H10O5/c16-9-3-1-8(2-4-9)13-7-12(19)15-11(18)5-10(17)6-14(15)20-13/h1-7,16-18H 5,7-dihydroxy-2-(4-hydroxyphenyl)-4H-chromen-4-one Oc1ccc(cc1)C2=CC(=O)c3c(O)cc(O)cc3O2 Oc1ccc(cc1)C2=CC(=O)c3c(O)cc(O)cc3O2