spectrum. There are some additional signals in the aliphatic and aromatic region, but of very weak intensity aswas confirmed by the analysis of 2D spectra and DEPT-135. The chemical shift difference between literature data (Jansson et al., 2006) and our signals,1.8 ppm for 13C (Table 3), (Lundborg & Widmalm, 2011), is a consequence of the internal reference standard we used (Section 2.9.2).
spectrum. There are some additional signals in the aliphatic and aromatic region, but of very weak intensity aswas confirmed by the analysis of 2D spectra and DEPT-135. The chemical shift difference between literature data (Jansson et al., 2006) and our signals,1.8 ppm for 13C (Table 3), (Lundborg & Widmalm, 2011), is a consequence of the internal reference standard we used (Section 2.9.2).
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