InChI=1S/C15H16O10/c16-7-3-1-2-6(4-5-8(17)18)12(7)24-15-11(21)9(19)10(20)13(25-15)14(22)23/h1-5,9-11,13,15-16,19-21H,(H,17,18)(H,22,23)/b5-4+