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