SMILES: CC1=CC2=NC3=C(C=C(C=C3)N(C)C)N=C2C=C1N
Description: The molecule is a member of the class of phenazines carrying methyl, amino and dimethylamino substituents at positions 2, 3 and 7 respectively. The free base of neutral red, which acts as a pH indicator, changing from red to yellow between pH 6.8 and 8.0. It has a role as a dye, an acid-base indicator and a two-colour indicator. It is a member of phenazines, a tertiary amino compound, a primary amino compound and an aromatic amine. It is a conjugate base of a neutral red(1+).