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Home › 2-alkoxy-3,5-diaminopyridine derivatives and their salts, and dye compositions for keratinous fibers containing the derivatives or salts

2-alkoxy-3,5-diaminopyridine derivatives and their salts, and dye compositions for keratinous fibers containing the derivatives or salts

US Patent 5378244 · Granted Jan 3, 1995

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