NC1=NC(c2ccccc2)(c2ccccc2)C2=[NH+]CCCN12    mol20701    1_1
NC1=[NH+]C(c2ccccc2)(c2ccccc2)C2=NCCCN21    mol20701    1_2
NC1=[NH+]C(c2ccccc2)(c2ccccc2)C2=[NH+]CCCN12    mol20701    2_1