InChI=1S/C21H20O13/c22-7-1-6(2-8(23)3-7)10-4-9(24)13-11(32-10)5-12(14(25)15(13)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)