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Koehn, S.K.; Tran, N.L.; Gronert, S.; Wu, W.M., The Stability of Aryl Carbanions Derived from Pyridine N-Oxide: The Role of Resonance in Stabilizing Aryl Anions, J. Am. Chem. Soc., 2010, 132, 1, 390-395, https://doi.org/10.1021/ja906473v . [all data]