InChI=1S/C21H20O13/c22-8-3-1-7(2-4-8)6-21(31)18(28)11-10(34-21)5-9(23)12(24)16(11)32-20-15(27)13(25)14(26)17(33-20)19(29)30/h1-5,13-15,17,20,22-27,31H,6H2,(H,29,30)