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Stable tetravalent phosphonium enolate zwitterions.
Zhu XF, Henry CE, Kwon O. Zhu XF, et al. J Am Chem Soc. 2007 May 30;129(21):6722-3. doi: 10.1021/ja071990s. Epub 2007 May 8. J Am Chem Soc. 2007. PMID: 17488018 Free PMC article.
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