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. 2007 Dec 19;104(52):20713–20718. doi: 10.1073/pnas.0708516105

Fig. 4.

Fig. 4.

Resonance Raman spectra obtained with 514.5-nm excitation of 2b (A) and 18O-labeled 2b (B; prepared from oxidation of 18O-labeled 1b) in frozen MeCN (77 K) in the presence of 100 mM KPF6. Solvent bands are labeled with “s.”