InChI=1S/C21H20O12/c22-9-7-11(24)18(32-21-17(29)15(27)16(28)19(33-21)20(30)31)14(26)12(9)13(25)10(23)6-8-4-2-1-3-5-8/h1-5,7,15-17,19,21-22,24,26-29H,6H2,(H,30,31)