InChI=1S/C21H18O13/c22-7-3-6(11-4-8(23)13-12(32-11)5-9(24)14(25)15(13)26)1-2-10(7)33-21-18(29)16(27)17(28)19(34-21)20(30)31/h1-5,16-19,21-22,24-29H,(H,30,31)