Nicotinonitrile,1,2-dihydro-6-hydroxy-1-(2-hydroxyethyl)-4-methyl-2-oxo- (8CI);3-Cyano-6-hydroxy-1-(b-hydroxyethyl)-4-methyl-2-pyridone;6-Hydroxy-1-(2-hydroxyethyl)-4-methyl-2-oxo-3-pyridinecarbonitrile
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