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