Assignment of the 13C NMR spectra of acTSE and acGSE
was made based on the publications of Czochanska et al.
[11] and Kennedy et al. [12,15]. The results are
summarized in Table 1. The spectra of the polymeric PA
of acTSE and acGSE were in good agreement with those
reported in the past, representing all the necessary signals
for polymeric tannins consisting of flavan-3-ols
(condensed tannins). Therefore, the polymeric tannins of
acTSH were confirmed as condensed tannins.