InChI=1S/C20H20O13/c21-5-20(30)4-9(24)12-10(33-20)2-6-1-7(22)3-8(23)11(6)16(12)31-19-15(27)13(25)14(26)17(32-19)18(28)29/h1-3,13-15,17,19,21-23,25-27,30H,4-5H2,(H,28,29)