SMILES: CN(C)C1=CC2=C(C=C1)N=C3C=CC(=[N+](C)C)C(=C3S2)[N+](=O)[O-]
Description: The molecule is an organic cation that is phenothiazin-5-ium substituted by dimethylamino groups at positions 3 and 7 as well as a nitro group at position 4. The chloride salt is the histological dye 'methylene green'.