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