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