C-13 CP/MAS NMR spectra of 3'-azido-3'-deoxythymidine (AZT) are interpreted
in the light of the published X-ray diffraction structure. The interpretat
ion provides for fast proton jumps in hydrogen bonds between the AZT molecu
les in dimers, and a slow puckering motion of the furanose rings. (C) 1999
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