Cc1nnc(N)n(C)c1=O mol9405 0_1 Cc1nnc([NH3+])n(C)c1=O mol9405 1_1 Cc1n[nH+]c(N)n(C)c1=O mol9405 1_2 Cc1[nH+]nc(N)n(C)c1=O mol9405 1_3