SMILES: C1=CC(=CC2=[NH+]C3=C(C=CC(=C3)N)C=C21)[NH3+]
Description: The molecule is an acridinium ion resulting from the protonation of the endocyclic nitrogen and one of the amino groups of 3,6-diaminoacridine. It is a conjugate acid of a 3,6-diaminoacridine(1+).