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