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