ABSTRACT
Objective: To investigate the lignans compounds constituents of Lavandula angustifolia. Methods: The chemical constituents were isolated and purified by TLC, silica gel, MCI-gel, and RP-HPLC, and their structures were identified by analysis of spectroscopic evidences and physicochemical properties. Results: A total of 11 constituents were isolated from L. angustifolia and elucidated as pinoresinol (1), syringaresinol (2), fraxiresinol-4'-O-β-D-glucopyranoside (3), syringaresinol-4'-O-β-D-glucopyranoside (4), 8-hydroxypinoresinol-4-O-β-D-glucopyranoside (5), rel-(2α,3β)-7-O-methylcedrusin (6), lariciresinol-4'-O-β-D-glucoside (7), (2S,3R)-2,3-dihydro-2-(4-hydroxy-3-methoxyphenyl)-3-hydroxymethyl-7-methoxybenzofuran-5-(trans) propen-1-ol-3-O-β-glucoside (8), (7S,8R)-dihydrodehydrodiconiferyl alcohol-9-β-D-glucopyranoside (9), (7R,8R)-7,8-dihydro-9'-hydroxyl-3'-methoxyl-8- hydroxymethyl-7-(4-hydroxy-3-methoxyphenyl)-1'-benzofuranpropanol-9'-O-β-D-glucopyranoside (10), and (E)-3-((2S,3S)-2-(4- hydroxy-3-methoxyphenyl)-3-hydroxymethyl-7-methoxy-2,3-dihydrobenzofuran-5-yl) allyl-2-hydroxyacetate (11). Conclusion: The 11 compounds are isolated from this plant for first time.
ABSTRACT
Objective: To identificate the bioactive natural products, and study the chemical constituents in the flower buds of Rosa rugosa. Methods: The chemical constituents in the flower buds of R. rugosa were isolated by silica gel, MCI-gel resin, Sephadex LH-20 column chromatography, and high performance liquid chromatography (HPLC) methods. Their structures were elucidated by spectroscopic methods, including extensive 1D and 2D NMR techniques. Results: Nine flavonoids were isolated from the flower buds of R. rugosa, and identified as 8-acetyl-4',7-dimethoxy-6-methyl-flavone (1), kaempferol (2), kaempferol-3-O-β-D-glucopyranoside (3), kaempferol-3-O-β-D-rutinside (4), quercetin (5), quercetin-3-O-β-D-glucopyranoside (6), rutin (7), luteolin (8), and luteolin-7-O-β-D-glucopyranoside (9). Conclusion: Compound 1 is a new compound and it displays the cytotoxicity against NB4, SH-SY5Y, PC3, A549, and MCF7 cells with IC50 values of 6.8, 5.6, 2.2, 1.8, and 7.4 μmol/L, respectively. Compound 9 is isolated from R. rugosa for the first time.
ABSTRACT
A new phenylpropanoid (1), together with seven known ones (2-8), has been isolated from the flowers of Rosa rugosa collected from Shanxi province by using various chromatographic techniques. Compound 1 is a new compound, and it displayed cytotoxicity against NB4, SH-SY5Y, PC3, A549 and MCF7 cell lines with IC₅₀ values of 8.2, 6.2, 4.3, 2.8, and 9.6 µmol · L⁻¹ respectively.