InChI=1S/C21H20O13/c22-7-2-1-6(10-4-8(23)13-12(32-10)5-9(24)14(25)15(13)26)3-11(7)33-21-18(29)16(27)17(28)19(34-21)20(30)31/h1-3,5,10,16-19,21-22,24-29H,4H2,(H,30,31)