InChI=1/C16H20N4O2/c1-4-5-11-6-10(8-13(21-2)14(11)22-3)7-12-9-19-16(18)20-15(12)17/h4-6,8-9H,7H2,1-3H3,(H4,17,18,19,20)/b5-4+/f/h17-18H2 DE3A1928816E97FD