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a) The reference 1D 1H NMR spectra of monastrol in the presence of Eg5, at 600 MHz and 298 K. b) The corresponding STD-NMR spectrum [I0−It] (×1) obtained by saturating at a δ value 1.67 ppm. The structure with proton numbering of monastrol is given for reference, and the corresponding signals are assigned.
