InChI=1S/C21H18O11/c22-12-6-5-10-13(23)11(7-30-18(10)14(12)24)8-1-3-9(4-2-8)31-21-17(27)15(25)16(26)19(32-21)20(28)29/h1-7,15-17,19,21-22,24-27H,(H,28,29)