InChI=1S/C19H16O8/c1-22-9-3-4-10-12(5-9)27-14-7-24-15-11(19(14,21)18(10)20)6-13(23-2)16-17(15)26-8-25-16/h3-6,14,21H,7-8H2,1-2H3/t14-,19-/m1/s1