4DO9:
reference: beta,gamma-CHF- and beta,gamma-CHCl-dGTP Diastereomers: Synthesis, Discrete (31)P NMR Signatures, and Absolute Configurations of New Stereochemical Probes for DNA Polymerases., Wu Y, Zakharova VM, Kashemirov BA, Goodman MF, Batra VK, Wilson SH, McKenna CE, J Am Chem Soc. 2012 May 30;134(21):8734-7. Epub 2012 May 18. PMID: 22397499

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