Figure 1.

Important structural motifs of lignins unambiguously identified in the HSQC analysis and ¹³C NMR spectra of the lignins discussed. Color coding matches that used in Figure 2. Positions marked with a dot have been used for assignments and semiquantitative evaluations. Dashed lines indicate parts of the structure that got lost during the pyrolysis, leading to the solid drawn fragment detectable in pyr-GC/MS.