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