Figures & data
Figure 1. Phytotoxic activities of EtOAc crude extract against leaves of panax ginseng. 75% ethanol (control) (a), the EtOAc crude extract (b).
Figure 2. Structures of tyrosol (1), 3-hydroxy-3-(4-methoxyphenyl) propanoic acid (2), and 3-benzylpiperazine-2, 5-dione (3).
Figure 3. 1H, 13C-NMR of compound 1.
Figure 4. 1H-NMR of compound 2.
Figure 5. 1H, 13C-NMR of compound 3.
Figure 6. Phytotoxic activity of tyrosol (1) (a), 3-hydroxy-3-(4-methoxyphenyl) propanoic acid (2) (b), and 3-benzylpiperazine-2, 5-dione (3) (c) at 5 × 10−3 mol. 75% ethanol was used as the control (d).
Figure 7. UPLC-ESI-TOF/MS/MS profiles of standard sample of DBP.
Figure 8. UPLC-MS/MS profiles of chemical pure EtOAc solvent (a); UPLC-MS/MS profiles of the EtOAc extract from liquid culture of Alternaria panax (b).
Scheme 1. Possible fragmentation pathway of DBP.
Figure 9. Leaf infiltration assay; 75% ethanol (control) (a), DBP (b).
