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