[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][N][Branch1][C][C][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][N][=C][C][=C][C][=Branch1][=Branch1][=N+1][Branch1][C][C][C][C][=Branch1][#Branch1][=C][Ring1][=Branch2][S][Ring1][#C][N+1][=Branch1][C][=O][O-1].[Cl-1]"}, {"from": "gpt", "value": "The molecule is an organic chloride salt having 3,7-bis(dimethylamino)-4-nitrophenothiazin-5-ium as the counterion. It stains nuclei green and is sometimes used as a counterstain to red or purple primary stains. It has a role as a fluorochrome and a histological dye. It contains a 3,7-bis(dimethylamino)-4-nitrophenothiazin-5-ium."}]