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Figure 5
(a) The 1H NMR spectrum of NPX–PA at 60 kHz MAS. Atom labelling is given for some sites such that the H-atom label is HX1, where X is the label of the directly bonded heavy atom, for example, the H atom on O36 is H361. (b) A section of the 1H–13C HETCOR spectrum of NPX–PA, with the hydrogen-bonded proton peaks and the NPX carboxyl carbon peaks labelled.

Journal logoSTRUCTURAL
CHEMISTRY
ISSN: 2053-2296
Volume 73| Part 3| March 2017| Pages 168-175
https://doi.org/10.1107/S2053229616011980
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