InChI=1/C16H22N4O/c1-4-18-15-6-5-12(2)9-14(15)16(21)19-13(3)10-20-8-7-17-11-20/h5-9,11,13,18H,4,10H2,1-3H3,(H,19,21)/t13-/m1/s1/f/h19H 8A291020AB96E24E