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Synthesis of substituted 2- and 4-carboxypyrylium salts
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Chemistry of Heterocyclic Compounds
[DOI: 10.1007/BF00507235]
Balaban, T. S.; Balaban, A. T., Science of Synthesis, (2003) 14, 131..
Formation of Pyrylium Salts by Dehydrocyclizations of Pentane-1,5-diones
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Science of Synthesis