InChI=1S/C21H20O11/c22-10-6-11-12(13(23)9(7-30-11)8-4-2-1-3-5-8)18(14(10)24)31-21-17(27)15(25)16(26)19(32-21)20(28)29/h1-6,9,15-17,19,21-22,24-27H,7H2,(H,28,29)