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Torii, Sigeru; Tanaka, Hideo; Anoda, Takuo; Simizu, Yasuo . (1976). A CONVENIENT PREPARATION OF MALTOL, ETHYLMALTOL, AND PYROMECONIC ACID FROM 2-ALKYL-6-METHOXY-2 <i>H</i> -PYRAN-3(6 <i>H</i> )-ONES. Chemistry Letters, 5(5), 495–498. doi:10.1246/cl.1976.495 
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