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A method for the production of hydrazones or their salts of 2 - methyl - 1.4 - naphthoquinone and nicotinic acid - or isonicotinic acid hydrazide
A method for the production of hydrazones or their salts of 2 - methyl - 1.4 - naphthoquinone and nicotinic acid - or isonicotinic acid hydrazide