InChI=1S/C21H19O12/c22-8-4-10(23)9-6-12(25)18(31-14(9)5-8)7-1-2-13(11(24)3-7)32-21-17(28)15(26)16(27)19(33-21)20(29)30/h1-6,15-17,19,21-28H,(H,29,30)