CCN(CC)c1ncnc2[nH]ncc12    mol4940    0_1
CCN(CC)c1nc[nH+]c2[nH]ncc12    mol4940    1_1
CCN(CC)c1ncnc2[nH][nH+]cc12    mol4940    1_2
CCN(CC)c1[nH+]cnc2[nH]ncc12    mol4940    1_3
CC[NH+](CC)c1ncnc2[nH]ncc12    mol4940    1_4