( b ) compounds of the substitution type of neutral red ( 2-methyl-3-amino-7-dimethyl-amino-phenazine ) show unexpectedly high g-c specificities and ( c ) dna ligands of pronounced sequence specificity for adjacent g-c pairs can be constructed by combining the structural elements of neutral red with an additional phenyl residue in the same molecule .
C0031375
phenazine
C0027941
neutral red