InChI=1S/C21H22O13/c1-6(8-3-2-7(22)4-9(8)23)13(25)12-11(5-10(24)14(26)15(12)27)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)