InChI=1S/C19H24N2O8/c1-7-11-9(5-6-21(7)2)8-3-4-10(22)16(12(8)20-11)28-19-15(25)13(23)14(24)17(29-19)18(26)27/h3-4,7,13-15,17,19-20,22-25H,5-6H2,1-2H3,(H,26,27)