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Home › Process for the production of 2,5-diamino-6-nitro-pyridine derivatives, their use in hair dye compositions and new 2,5-diamino-6-nitropyridine derivatives

Process for the production of 2,5-diamino-6-nitro-pyridine derivatives, their use in hair dye compositions and new 2,5-diamino-6-nitropyridine derivatives

US Patent 4950302 · Granted Aug 21, 1990

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