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Tamás Patonay, László Hegedüs, Erzsébet Patonay-Péli
Flavonoids. 43 [1,2]. Deprotonation-initiated aryl migration with sulfur dioxide extrusion: A route to 2,3-dihydro-2,3-diaryl-3-hydroxy-4H-1-benzopyran-4-ones
Journal of Heterocyclic Chemistry
1992. – Vol. 30, Issue 1. – P. 145 - 151
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http://dx.doi.org/10.1002/jhet.5570300126