InChI=1S/C21H26N2O10/c1-8(2)21(3)20(31)22-16(23-21)11-6-9(4-5-10(11)17(27)28)7-32-19-14(26)12(24)13(25)15(33-19)18(29)30/h4-6,8,12-15,19,24-26H,7H2,1-3H3,(H,27,28)(H,29,30)(H,22,23,31)