Fig. S1 (UHPLC-ESI-HRMS analysis of purified NCbas), S2 (Chemical shifts of the 6-OHBza-N-α-ribofuranosyl fragment and 1H-1H ROESY key correlations for determination of the position of the hydroxyl group), S3 to S9 (6-OHBza-NCba spectra), S10 (Chemical shifts of the 5-OMeBza-N-α-ribofuranosyl fragment), S11 to S15 (5-OMeBza-NCba spectra), S16 (Chemical shifts of the 5-MeBza-N-α-ribofuranosyl fragment), S17 to S21 (5-MeBza-NCba spectra), S22 (Chemical shifts of the 6-MeBza-N-α-ribofuranosyl fragment), S23 to S27 (6-MeBza-NCba spectra), S28 (Transcript level of the pceA gene), and S29 (HPLC elution profiles of NCbas extracted from PceA); Tables S1 (Monoisotopic masses of the NCbas) and S2 (Data collection and refinement statistics); and supplemental text
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