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