Fig. 1 in Comprehensive characterization of polyacetylenes and diterpenes from the underground parts of Solidago altissima L. and their contribution to the overall allelopathic activity

Fig. 1. High-performance liquid chromatography/diode array detection, total ion current (TIC), and extracted ion current chromatograms of the extract of the underground parts of S. altissima. (A) Monitored at 254 nm; (B) monitored at 230 nm; (C) monitored at 330 nm; (D) operated in positive ion mode. a) TIC, b) m/z 273.111 ([M H]+ of compounds 8 and 9), c) m/z 261.113 ([M H]+ of compound 6), d) m/z 259.095 ([M H]+ of compounds 2–4), e) m/z 173.061 ([M + + + + H–C H O]+ of compound 4), f) m/z 159.045 ([M + H–C H O]+ of compounds 2 and 3); (E) TIC in negative ion mode. The scale factors of the chromatograms are 4 6 2 5 8 2 indicated in parentheses. The numbers in the figure correspond to the compounds listed in Table 1.