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