Nc1nc(N)c2ccccc2n1 mol7866 0_1 Nc1nc([NH3+])nc2ccccc12 mol7866 1_1 Nc1nc([NH3+])c2ccccc2n1 mol7866 1_2 Nc1nc(N)c2ccccc2[nH+]1 mol7866 1_3 Nc1nc2ccccc2c(N)[nH+]1 mol7866 1_4