InChI=1S/C20H18O16/c21-5-1-3(17(29)30)7(11(25)9(5)23)8-4(18(31)32)2-6(22)10(24)15(8)35-20-14(28)12(26)13(27)16(36-20)19(33)34/h1-2,12-14,16,20-28H,(H,29,30)(H,31,32)(H,33,34)