SMILES: CNC1=CC2=C(C=C1)N=C3C=CC(=[N+](C)C)C=C3S2
Description: The molecule is an organic cation that is phenothiazin-5-ium substituted by dimethylamino and amino groups at positions 3 and 7 respectively. The chloride salt is the histological dye 'azure B'.