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Home › Mono- and bis-azo compounds containing 6-hydroxy-3-heterocyclic onium-pyridone-2-groupings coupled to diazo components containing diazine or triazine rings

Mono- and bis-azo compounds containing 6-hydroxy-3-heterocyclic onium-pyridone-2-groupings coupled to diazo components containing diazine or triazine rings

US Patent 5175259 · Granted Dec 29, 1992

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