InChI=1S/C21H20O14/c22-7-3-10(25)14(11(26)4-7)15(28)12(27)1-6-2-13(9(24)5-8(6)23)34-21-18(31)16(29)17(30)19(35-21)20(32)33/h2-5,16-19,21-26,29-31H,1H2,(H,32,33)