RESUMO
A new neolignan compound, tonkinensisin A (1), and two phenylpropanoid compounds, tonkinensisin B (2) and tonkinensisin C (3), were isolated from the resin of Styrax tonkinensis (Pierre) Craib ex Hartw. The structures of these compounds were determined by spectroscopic analysis, and the relative configurations of compounds 1 and 3 were determined by J-based configuration analysis (JBCA) method. All compounds were assayed for cytotoxic activities against five tumor cell lines (HepG-2, A549, Hela, MCF-7, and PC-3) by CCK-8 test in vitro.[Formula: see text].
Assuntos
Medicamentos de Ervas Chinesas , Lignanas , Linhagem Celular Tumoral , Humanos , Lignanas/farmacologia , Estrutura Molecular , Resinas Vegetais , StyraxRESUMO
Cysestermerol A (1), a rare and new stilbene sestermer, was isolated from the whole herb of Cynodon dactylon. The planar and relative structures of 1 were elucidated based on HRESIMS, one- and two-dimensional NMR analyses, and its absolute configuration was further established by electronic circular dichroism calculations. Compound 1 obviously increased the glucose consumption in HepG2 cells equivalent to the positive control rosiglitazone and markedly inhibited the activity of α-glucosidase in vitro.
Assuntos
Cynodon , Hipoglicemiantes/farmacologia , Estilbenos , Cynodon/química , Inibidores de Glicosídeo Hidrolases/isolamento & purificação , Inibidores de Glicosídeo Hidrolases/farmacologia , Células Hep G2 , Humanos , Hipoglicemiantes/isolamento & purificação , Espectroscopia de Ressonância Magnética , Estrutura Molecular , Compostos Fitoquímicos/isolamento & purificação , Compostos Fitoquímicos/farmacologia , Extratos Vegetais , Estilbenos/isolamento & purificação , Estilbenos/farmacologia , alfa-GlucosidasesRESUMO
A novel sesquilignan compound (1), possesing an unusual carbon skeleton of aryltetralin unit linked with a C6-C3 unit and a five-membered ring by a C-7â³ and C-4 linkage pattern via an oxygen atom, and a new lignan glycoside (2) have been isolated from the twigs and leaves of Illicium majus. Their structures were determined by spectroscopic analysis and chemical methods. The absolute configurations of 1 and 2 are confirmed by observing the circular dichroism. At 10⯵M, Compounds 1 and 2 showed in Vitro inhibitory activity against the release of ß-glucuronidase in rat polymorphonuclear leukocytes induced by platelet-activating factor.
Assuntos
Glucuronidase/antagonistas & inibidores , Glicosídeos/química , Illicium/química , Lignanas/química , Neutrófilos/efeitos dos fármacos , Animais , Células Cultivadas , Dicroísmo Circular , Estrutura Molecular , Folhas de Planta/química , Fator de Ativação de Plaquetas , RatosRESUMO
Eight compounds were isolated from the stems of Brucea mollis by various chromatographic techniques such as column chromatography on silica gel and Sephadex LH-20, and preparative HPLC, and their structures were elucidated as bruceolline O (1), 1-(1-beta-glucopyranosyl)-1H-indole-3-carbaldehyde (2), canthin-6-one (3), 11-hydroxycanthin-6-one (4), 9-methoxycanthin-6-one (5), 4-methoxycanthin-6-one (6), infractin (7), and beta-carboline-1-propionic acid (8). The cytotoxic activities of compounds 1-8 against HCT-8 and A549 human cell lines were determined, but none of them exhibited significant activity (IC 50 > 10 micromol x L(-1)). Among them, compound 1 is a new indole alkaloid, and compounds 2 and 5-7 were isolated from this plant for the first time.
Assuntos
Antineoplásicos Fitogênicos/farmacologia , Brucea/química , Alcaloides Indólicos/isolamento & purificação , Plantas Medicinais/química , Antineoplásicos Fitogênicos/química , Antineoplásicos Fitogênicos/isolamento & purificação , Carbolinas/química , Carbolinas/isolamento & purificação , Carbolinas/farmacologia , Linhagem Celular Tumoral , Humanos , Alcaloides Indólicos/química , Alcaloides Indólicos/farmacologia , Estrutura Molecular , Caules de Planta/químicaRESUMO
Ten compounds were isolated from the stems of Brucea mollis by various chromatographic techniques such as column chromatography on silica gel and Sephadex LH-20, and preparative HPLC, and their structures were elucidated as deacetylated isobrucein B (1), indaquassin X (2), cleomiscosin A (3), cleomiscosin B (4), (+)-lyoniresinol (5), (+)-epipinoresinol(6), (+)-pinoresinol (7), (+)-syringaresinol (8), 4,5-dihydroblumenol A (9) and adenosine (10) on the basis of spectroscopic data analysiS. All compounds were obtained from this plant for the first time, moreover, compound 1 was a new natural product. Compound 2 showed significant cytotoxic activities against the human cell lines HT-29, HepG2, BGC-823 and SKOV3 with IC50 values of 0.84-3.97 micromol x L(-1).
Assuntos
Brucea/química , Extratos Vegetais/química , Extratos Vegetais/farmacologia , Linhagem Celular Tumoral , Ensaios de Seleção de Medicamentos Antitumorais , Células HT29 , Células Hep G2 , Humanos , Concentração Inibidora 50 , Caules de Planta/química , Plantas Medicinais/químicaRESUMO
Four new abietane diterpenes (1-4) and two new cycloparvifloralone-type sesquiterpenoids (5-6) have been isolated from the twigs and leaves of Illicium majus, together with three known sesquiterpenoids and five known diterpenoids. Their structures were determined by spectroscopic analysis and chemical methods. The absolute configuration of the 15,16-diol moiety in 2 is confirmed by Snatzke's method, observing the induced circular dichroism after the addition of dimolybdenum tetraacetate in DMSO. Compound 2 exihibited significant anti-inflammatory activity with an IC50 value of 0.26 ± 0.03 µM, while compounds 10, 11, and 13 showed good anti-inflammatory activities with IC50 values ranging from 1.94 ± 0.56 to 2.60 ± 0.48 µM.
Assuntos
Anti-Inflamatórios/farmacologia , Diterpenos/farmacologia , Illicium/química , Sesquiterpenos/farmacologia , Abietanos/química , Abietanos/isolamento & purificação , Abietanos/farmacologia , Animais , Anti-Inflamatórios/química , Anti-Inflamatórios/isolamento & purificação , Linhagem Celular Tumoral , China , Dicroísmo Circular , Diterpenos/química , Diterpenos/isolamento & purificação , Humanos , Concentração Inibidora 50 , Espectroscopia de Ressonância Magnética , Estrutura Molecular , Neutrófilos/efeitos dos fármacos , Compostos Organometálicos , Folhas de Planta/química , Caules de Planta/química , Plantas Medicinais , Ratos , Sesquiterpenos/química , Sesquiterpenos/isolamento & purificação , EstereoisomerismoRESUMO
Two new sesquiterpenes, dunnianoside I (1) and 8'-oxo-6-hydroxy-dihydrophaseic acid methyl ester (2), a new glycoside, dunnianoside J (3), two new neolignans, dunnianeolignans A-B (4, 5), together with 10 known compounds (6-15), were isolated from the roots of Illicium dunnianum. The structures of these new compounds were elucidated by spectroscopic methods including 1D and 2D NMR, HR-ESI-MS, and chemical methods. Compounds 7, 8, and 13-15 exhibited potent antioxidant activities against Fe²âº-cystine-induced rat liver microsomal lipid peroxidation, with IC50 values ranging from 4.2 ± 0.4 to 38.4 ± 2.6 µM.
Assuntos
Antioxidantes/isolamento & purificação , Medicamentos de Ervas Chinesas/isolamento & purificação , Glicosídeos/isolamento & purificação , Illicium/química , Lignanas/isolamento & purificação , Sesquiterpenos/isolamento & purificação , Animais , Antioxidantes/química , Antioxidantes/farmacologia , Medicamentos de Ervas Chinesas/química , Medicamentos de Ervas Chinesas/farmacologia , Glicosídeos/química , Lignanas/química , Lignanas/farmacologia , Peroxidação de Lipídeos/efeitos dos fármacos , Malondialdeído/análise , Microssomos Hepáticos/química , Microssomos Hepáticos/efeitos dos fármacos , Estrutura Molecular , Ressonância Magnética Nuclear Biomolecular , Raízes de Plantas/química , Ratos , Sesquiterpenos/química , Sesquiterpenos/farmacologiaRESUMO
Seven new indole alkaloids, bruceollines H-N (1-7), three new quassinoids, yadanziolides T-V (10-12), and four known analogues, bruceolline E (8), bruceolline F (9), bruceine D (13), and yadanziolide B (14), were isolated from an ethanol extract of the stems of Brucea mollis. The absolute configurations of compounds 2 and 5 were determined by comparison of their experimental and calculated ECD spectra. The absolute configuration of the known compound 9 was determined by using Mo2(OAc)4-induced CD analysis for the first time. Compounds 10, 13, and 14 exhibited cytotoxic activities with IC50 values of 3.00-5.81 µM.
Assuntos
Antineoplásicos Fitogênicos/isolamento & purificação , Brucea/química , Medicamentos de Ervas Chinesas/isolamento & purificação , Alcaloides Indólicos/isolamento & purificação , Plantas Medicinais/química , Quassinas/isolamento & purificação , Animais , Antineoplásicos Fitogênicos/química , Antineoplásicos Fitogênicos/farmacologia , Ensaios de Seleção de Medicamentos Antitumorais , Medicamentos de Ervas Chinesas/química , Medicamentos de Ervas Chinesas/farmacologia , Humanos , Alcaloides Indólicos/química , Alcaloides Indólicos/farmacologia , Estrutura Molecular , Ressonância Magnética Nuclear Biomolecular , Caules de Planta/química , Quassinas/química , Quassinas/farmacologiaRESUMO
OBJECTIVE: To study the chemical constituents and antitumor activities of Euonymus alatus. METHOD: Compounds were isolated and purified repeatedly by silica gel, Sephadex LH-20 column chromatography, and their chemical structures were elucidated by their physicochemical properties and spectral data, such as 1H-NMR, 13C-NMR and EI-MS. The trypan blue experiments in vitro were used to observe the antitumor activity of several compounds. RESULT: Ten compounds were obtained and identified as (+)-usnic acid (1), benzoic acid (2), 2-hydroxy-4-methoxy-3, 6-dimethyl benzoic acid (3), lupeol (4), 3 beta-hydroxy-30-norlupan-20-one (5), (2R, 3R)-3, 5, 7, 4'-tetrahydroxy flavanone (6), kaempferol (7), 5, 7, 4'-trihydroxy flavanone (8), quercetin (9) and daucosterol (10). CONCLUSION: Compounds 1, 2, 5 and 8 were isolated from this genus for the first time. The trypan blue experiments in vitro showed that compounds 1, 4 and 5 had growth inhibitory effects on HL-60 cells.