InChI=1S/C21H20O11/c22-8-1-3-10-12(5-8)29-7-21(28)11-4-2-9(6-13(11)31-18(10)21)30-20-16(25)14(23)15(24)17(32-20)19(26)27/h1-6,14-18,20,22-25,28H,7H2,(H,26,27)