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