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