InChI=1/C17H20N4O4/c1-9-11(16(18)21-17(19)20-9)5-6-12(22)10-7-13(23-2)15(25-4)14(8-10)24-3/h7-8,12,22H,1-4H3,(H4,18,19,20,21)/t12-/m1/s1/f/h18-19H2 5719972AA9DEFA8C