InChI=1/C16H22N4O2/c1-12(16(22)19(2)3)18-15(21)11-20(4)10-14-7-5-13(9-17)6-8-14/h5-8,12H,10-11H2,1-4H3,(H,18,21)/p+1/t12-/m1/s1/fC16H23N4O2/h18,20H/q+1 357644D1D4F4A344