Fig. 2.

Wide-ranging NMR spectral characterization of purified suberin. (a) The NMR ¹H and (b) ¹³C spectra, with inserts focusing on the aliphatic and aromatic regions; and the HSQC spectrum: (c) full and regions corresponding to (d) aliphatics, (e) glycerol CH-Acyl and CH/CH₂-X aliphatics, and (f) aromatics of the purified suberin. (g) The chemical structure of linear aliphatic esters and of acylglycerol esters comprising all possible configurations are presented. Text inserts in the HSQC spectra indicate the relative abundance (%) of the different acylglycerol configurations present within each sample as well as the ratio of aliphatic esters and acylglycerol esters. AcylGEs and LAEs stand for acylglycerol esters and linear aliphatic esters, respectively; TAG, DAG, and MAG stand for triacylglycerol, diacylglycerol, and monoacylglycerol, respectively. Some correlations (unlabeled) are uncertain or unidentified.