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5H-Benzo[a]phenothiazine-2-sulfonicacid, 9-(dimethylamino)-6-hydroxy-5-oxo-, sodium salt(1:1)

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5H-Benzo[a]phenothiazine-2-sulfonicacid, 9-(dimethylamino)-6-hydroxy-5-oxo-, sodium salt(1:1)