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