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