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