InChI=1S/C22H18O13/c1-33-10-4-7(24)3-9-11(10)15(27)12-8(14(9)26)2-6(5-23)13(25)19(12)34-22-18(30)16(28)17(29)20(35-22)21(31)32/h2-5,16-18,20,22,24-25,28-30H,1H3,(H,31,32)