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