InChI=1S/C21H22O13/c1-6(8-2-3-9(22)15(27)14(8)26)13(25)12-10(23)4-7(5-11(12)24)33-21-18(30)16(28)17(29)19(34-21)20(31)32/h2-6,16-19,21-24,26-30H,1H3,(H,31,32)