InChI=1S/C20H20O14/c21-5-12-15(28)17(33-18(30)6-1-8(22)13(26)9(23)2-6)16(29)20(32-12)34-19(31)7-3-10(24)14(27)11(25)4-7/h1-4,12,15-17,20-29H,5H2