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