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