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. 2019 Nov 21;63:10.29219/fnr.v63.3419. doi: 10.29219/fnr.v63.3419

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© 2019 Michael T.D. Campbell et al.

This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 International License, allowing third parties to copy and redistribute the material in any medium or format and to remix, transform, and build upon the material for any purpose, even commercially, provided the original work is properly cited and states its license.

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Fig. 3 — (A) The proposed scheme for degradation of NR to nicotinamide and sugar under basic conditions. (B) Proton NMR spectra of (from top to bottom) NR, Nam, D(-)-ribose, and degraded NR after forced degradation with stars representing the H2 proton on NR and Nam, respectively. (C) HPLC chromatogram using UV detection at 266 nm showing (left) NR with a retention time of 1.015 min, (middle) the reference Nam with a retention time at 2.199 min, and partially degraded NR showing a mixture of NR and Nam.