InChI=1S/C21H22O12/c1-21(29)6-9(23)13-11(33-21)4-7-3-8(22)5-10(30-2)12(7)17(13)31-20-16(26)14(24)15(25)18(32-20)19(27)28/h3-5,14-16,18,20,22,24-26,29H,6H2,1-2H3,(H,27,28)