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A phytochemical investigation on the whole plant of Paraboea rufescens led to the isolation of a new compound Paraboside C (1) and eight known compounds, which including two phenylpropanoid glycosides (2 and 3), two glycosides (4 and 5), three triterpenoids (6–8), and one ethyl cyclohexanol derivative (9). Their structures were elucidated based on extensive spectroscopic methods (NMR, MS, UV, IR and ECD experiments) and comparison with literature data. Compounds 2 and 5 exhibited significant neuroprotective activities against corticosterone induced PC12 cells, which presenting a dose-dependent effect. The chemotaxonomic significance of the isolated compounds were also been discussed. [Display omitted] • 9 compounds were isolated from the whole plant of Paraboea rufescens. • Compound 1 was a new phenylpropanoid glycoside. • Compounds 3 – 9 were isolated from P. rufescens for the first time. • Compounds 2 and 5 exhibited significant neuroprotective activities. • The chemotaxonomic significance of the isolated compounds were discussed. [ABSTRACT FROM AUTHOR]

The phytochemical study on the whole plant of Lobelia davidii Franch. (Campanulaceae) resulted in the isolation of one new polyacetylene, davidiotylin A (1), one new natural compound, (5 R) N -methyl-5-acetophenone-pyrrolidine-2-one (6), along with six known compounds including lobetyolin (2), choushenpilosulyne A (3), lobetyol (4), fissistigmol A (5), pistaciamide (7), N , N′ -dicoumaroylputrescine (8). Their structures were characterized by the comprehensive analysis of their NMR, IR, UV, ECD spectra and HRESIMS data. All the isolated compounds were reported from L. davidii for the first time. The chemotaxonomic significance of these compounds was discussed. [Display omitted] • Eight compounds were isolated from the whole plant of Lobelia davidii Franch. • Compounds 1 was identified as a new polyacetylene. • Compound 6 was a new natural compound, and its absolute configuration was determined by ECD spectrum. • All compounds were isolated from L. davidii for the first time. • The chemotaxonomic significance of the isolated compounds was discussed. [ABSTRACT FROM AUTHOR]

The phytochemical investigation on the leaves and twigs of Zanthoxylum dimorphophyllum Hemsl led to the isolation of a new compound 7-(4′ R -hydroxy-3′,7′-dimethyl-2′ E ,6′-octadienyloxy) coumarin (1) and fourteen known compounds, including nine coumarins (2 – 10), one alkaloid (11), three lignans (12 – 14) and one flavone (15). Their structures were elucidated based on extensive spectroscopic methods (NMR, MS, UV, IR and ECD experiments) and comparison with literature data. The chemotaxonomic significance of the isolated compounds has also been discussed. [Display omitted] • 15 compounds were isolated from the leaves and twigs of Zanthoxylum dimorphophyllum. • Compound 1 was a new coumarin. • Compounds 2 , 3 , 5 , 7–10 and 12 were isolated from Z. dimorphophyllum for the first time. • Chemotaxonomic relationships among Z. dimorphophyllum , the genus Zanthoxylum and the family Rutaceae were discussed. [ABSTRACT FROM AUTHOR]