Carbon-13 nuclear magnetic resonance spectrometry of globotriaosylceramide.

Resonances in the carbon-13 natural abundance, proton-decoupled, 90.5 MHz nuclear magnetic resonance spectrum of globotriaosylceramide were assigned to specific carbon nuclei. The chemical shifts were rationalized in terms of the number of sugar residues, the sugar ring structures, the positions and anomeric configurations of the intersugar linkages, and the approximate degree of unsaturation of the alkyl chains of the ceramide moiety.