InChI=1/C16H18N4O2/c1-4-20-15(21)13-8-6-5-7-12(13)14(18-20)16(22)19(3)10-11(2)9-17/h5-8,11H,4,10H2,1-3H3/t11-/m1/s1 67267890BD4D6342