InChI=1S/C21H20O14/c22-7-1-6(3-10(24)13(26)12-9(23)5-11(25)14(27)15(12)28)2-8(4-7)34-21-18(31)16(29)17(30)19(35-21)20(32)33/h1-2,4-5,16-19,21-23,25,27-31H,3H2,(H,32,33)