Nc1nc(N)nc(N2CCOCC2)n1    mol33877    0_1
Nc1nc(N)nc([NH+]2CCOCC2)n1    mol33877    1_1
Nc1nc([NH3+])nc(N2CCOCC2)n1    mol33877    1_2
Nc1nc(N)[nH+]c(N2CCOCC2)n1    mol33877    1_3
Nc1nc(N2CCOCC2)nc(N)[nH+]1    mol33877    1_4