InChI=1S/C21H20O14/c1-3-7-9(11(18(27)28)20(31)32-2)12(23)10-8(33-7)5-4-6(22)16(10)34-21-15(26)13(24)14(25)17(35-21)19(29)30/h3-5,11,13-15,17,21-22,24-26H,1H2,2H3,(H,27,28)(H,29,30)