InChI=1S/C21H20O14/c22-6-2-1-5(12(25)13(6)26)9-3-7(23)11-10(33-9)4-8(24)14(27)18(11)34-21-17(30)15(28)16(29)19(35-21)20(31)32/h1-2,4,9,15-17,19,21-22,24-30H,3H2,(H,31,32)