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