Fig. 2. Anomeric region of the 1H NMR spectra for the three BTM-C9 isomers showing their high diastereomeric purity (see Fig. S1† for the full range of 1H NMR spectra). Each isomer gave unique spectral features in the anomeric region, indicative of the clear differentiation of the individual isomers by their 1H NMR spectra. Vicinal coupling constants (3 J aa & 3 J ae) are indicated above individual peaks to allow differentiation of the α- and β-anomeric protons (H e and H a, respectively, in blue). The chemical structure of the maltoside head group is shown at the top right corner to illustrate the anomeric protons of interest.
