1-Butyl-2-hydroxy-4-methyl-5-cyano-6-pyridinone;1-Butyl-3-cyano-4-methyl-6-hydroxy-2-pyridone;1-Butyl-3-cyano-6-hydroxy-4-methyl-2(1H)-pyridinone;1-Butyl-3-cyano-6-hydroxy-4-methyl-2-pyridone;N-Butyl-3-cyano-6-hydroxy-4-methyl-2-pyridone;N-Butyl-3-cyano-6-hydroxy-4-methylpyridone
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