InChI=1/C16H20N4O2/c1-16(2,3)14-13-10(7-11(21)18-15(13)20-19-14)9-5-6-12(22-4)17-8-9/h5-6,8,10H,7H2,1-4H3,(H2,18,19,20,21)/t10-/m0/s1/f/h18,20H C92A4A9216828088