InChI=1S/C21H22O12/c1-7(8-2-4-9(22)5-3-8)12(24)10-6-11(23)14(26)18(13(10)25)32-21-17(29)15(27)16(28)19(33-21)20(30)31/h2-7,15-17,19,21-23,25-29H,1H3,(H,30,31)