CC1=Nc2c(C)ncnc2NC1    mol4759    0_1
CC1=Nc2c(C)ncnc2[NH2+]C1    mol4759    1_1
CC1=[NH+]c2c(C)ncnc2NC1    mol4759    1_2
CC1=Nc2c(nc[nH+]c2C)NC1    mol4759    1_3
CC1=Nc2c(C)nc[nH+]c2NC1    mol4759    1_4