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