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Spectral region of the 1H NMR spectra (600 MHz, CDCl3, 25 °C) including the resonances of the para and ortho protons of the racemic mixture of 1 in the presence of the CSA (10 mM) at the CSA/substrate stoichiometric ratios of: (a) 1:1 and (b) 1:2. Nonequivalence data are shown.
