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Home › Pyrrole derivatives of 1,4-naphthoquinone and of 1,4-dihydroxynaphthalene for dyeing keratin fibers, compositions comprising the same, and dyeing process

Pyrrole derivatives of 1,4-naphthoquinone and of 1,4-dihydroxynaphthalene for dyeing keratin fibers, compositions comprising the same, and dyeing process

US Patent 6022379 · Granted Feb 8, 2000

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