InChI=1S/C19H24N2O7/c1-8-13-11(5-6-21(8)2)10-4-3-9(7-12(10)20-13)27-19-16(24)14(22)15(23)17(28-19)18(25)26/h3-4,7-8,14-17,19-20,22-24H,5-6H2,1-2H3,(H,25,26)