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