InChI=1S/C21H24O12/c1-21(2,20(29)33-19-14(25)12(23)13(24)16(32-19)18(27)28)17(26)11-9(30-3)6-4-8-5-7-10(22)31-15(8)11/h4-7,12-14,16-17,19,23-26H,1-3H3,(H,27,28)