An additional high resolution 1D 1 H spectrum at 318 K was obtained using a Bruker 500 MHz AVANCE III HD spectrometer equipped with a 5 mm BBOF probe. 1024 transients were acquired during 5 s and a recycle delay of 1 s. Using this spectrum, the 3 JH-1,H-2 scalar coupling constants were estimated from the doublet splitting of the anomeric H-1 signals in the spectrum, processed with a pure sine window function to obtain highest possible resolution. Estimates of the relative amounts of the different reaction products were obtained from integration of H-1 and resolved H-2 resonances in a 1D 1 H NMR spectrum.