InChI=1S/C21H28N2O11/c1-8-5-6-9(10(7-8)15(22)23-21(4,19(30)31)20(2,3)32)17(29)34-18-13(26)11(24)12(25)14(33-18)16(27)28/h5-7,11-14,18,24-26,32H,1-4H3,(H2,22,23)(H,27,28)(H,30,31)