CC(=O)c1nccnc1N=CN    mol3971    0_1
CC(=O)c1nccnc1[NH+]=CN    mol3971    1_1
CC(=O)c1[nH+]ccnc1N=CN    mol3971    1_2
CC(=O)c1ncc[nH+]c1N=CN    mol3971    1_3