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. Author manuscript; available in PMC: 2008 Sep 2.
Published in final edited form as: J Am Chem Soc. 2007 Jan 31;129(4):794–802. doi: 10.1021/ja065536k

Fig. 1.

Fig. 1

31P NMR spectrum obtained by acquiring the FID after a 90° RF pulse in the presence of proton decoupling. 64 transients were accumulated. The chemical shift scale was referenced by setting the isotropic chemical shift peak observed at 10°C to 0 ppm.