Identification of the Chromatographic Peaks. The examination
of the chromatograms in a full-scan mode revealed
the presence of several compounds, which were positively
identified by comparison with available standards. Figure 1
showed the HPLC chromatogram of ethanol extract from H.
tuberosus leaves. There were 15 phenolic peaks separated in
extracts using the reversed phase C-18 column. As shown
in Table 1, peak identification was performed by comparing
retention times (