InChI=1S/C21H28N2O11/c1-8-4-5-10(11(6-8)16(22)23-21(3,20(31)32)9(2)7-24)18(30)34-19-14(27)12(25)13(26)15(33-19)17(28)29/h4-6,9,12-15,19,24-27H,7H2,1-3H3,(H2,22,23)(H,28,29)(H,31,32)