InChI=1S/C21H30O10/c1-18(2)4-8-9(5-18)19(3)6-10(21(19,28)20(7-22)15(8)31-20)29-17-13(25)11(23)12(24)14(30-17)16(26)27/h7-15,17,23-25,28H,4-6H2,1-3H3,(H,26,27)