Fc1cnc(Nc2cccc(Br)c2)nc1Nc1cccc(Br)c1    SM21    0_1
Fc1c[nH+]c(Nc2cccc(Br)c2)nc1Nc1cccc(Br)c1    SM21    1_1
Fc1cnc([NH2+]c2cccc(Br)c2)nc1Nc1cccc(Br)c1    SM21    1_2
Fc1cnc(Nc2cccc(Br)c2)nc1[NH2+]c1cccc(Br)c1    SM21    1_3
Fc1cnc(Nc2cccc(Br)c2)[nH+]c1Nc1cccc(Br)c1    SM21    1_4