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Keywords: Niacin OR 59-67-6 OR nicotinic acid OR Vitamin B3 OR Niacin (USP) OR P. P. Factor OR 3-Picolinic acid OR antipellagra vitamin OR 3-Pyridinecarboxylic acid OR pellagra preventive factor OR Pyridine-3-carboxylic acid OR Pyridine-.beta.-carboxylic acid