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1H-NMR spectra of the AtmS8/AtmS9/AtmS14 coupled reaction: (i) AtmS8/AtmS9/AtmS14 coupled reaction where AtmS14 was added after the completion of AtmS9-catalyzed transformation based upon NMR (spectra recorded 20 h post-AtmS9 addition); and (ii) AtmS8/AtmS9 coupled reaction. Proton signals corresponding degraded diketo-intermediate (6) and the 4-T anomeric protons are labelled.
