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