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