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