InChI=1S/C21H14O14/c22-9-1-6(19(30)31)3-12(15(9)26)34-20(32)7-2-10(23)16(27)13(4-7)35-21(33)8-5-11(24)17(28)18(29)14(8)25/h1-5,22-29H,(H,30,31)