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