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Representative 1H-NMR spectra of the hydromethanolic extracts of Sambucus nigra leaves from genotype GR-1-BBGK-19,596 under (a) no fertilization (control), (b) conventional, and (c) organic fertilization treatments (CD3OD, 500 MHz). Chemical shifts are reported in ppm on the x-axis (0.0–8.0).
