InChI=1S/C19H14O8/c1-6-7-3-2-4-8(20)12(7)16(24)13-11(6)17(25)14-15(23)9(21)5-10(22)19(14,27)18(13)26/h2-4,11,13-14,17,20,25,27H,1,5H2/t11?,13?,14?,17?,19-/m0/s1