Screening α-glucosidase inhibitors from mulberry extracts via DOSY and relaxation-edited NNR

► Our strategy can screen the inhibitors of α-glucosidase in mixtures. ► As long as the resonance(s) of ligand(s) can be detected by NMR, the ligand(s) could be identified. ► The process is time saving and labor saving. ► Our strategy can discover minor active components which may be lost in separation process.