SMILES: C1=C(C2=C(N1)N=C(NC2=O)N)C(=[NH2+])N
Description: The molecule is a carboxamidinium ion that is the conjugate acid of 7-formamidino-7-deazaguanine, arising from selective protonation of the imino nitrogen; major species at pH 7.3. It is a conjugate acid of a 7-formamidino-7-deazaguanine.