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Five new secoiridoid glycosides and one unusual lactonic enol ketone with anti-HBV activity from Swertia cincta
Fitoterapia 102:96 (2015)Five new secoiridoid glycosides, swericinctosides A and B (1–2), 9-epi swertiamarin (3), 2′-O-m-hydroxybenzoyl swertiamarin (4), 4″-O-acetyl swertianoside E (5), and one unusual lactonic enol ketone, 3-(hydroxymethyl ene) dihydro-2H-pyran-2, 4(3H)-dione (6), together with three known compo...
Fitoterapia 101:IFC (2015)
Identification of dehydroabietc acid from Boswellia thurifera resin as a positive GABAA receptor modulator.
In a two-microelectrode voltage clamp assay with Xenopus laevis oocytes, a petroleum ether extract (100 μg/mL) of the resin of Boswellia thurifera (Burseraceae) potentiated GABA-induced chloride currents (IGABA) through receptors of the subtype α₁β₂γ₂s by 319.8% ± 79.8%. With the aid of HPLC-based a...
Neolignan inhibitors of antigen-induced degranulation in RBL-2H3 cells from the needles of Pinus thunbergii.
The ethanolic extract of the needles of Pinus thunbergii was found to suppress antigen mediated degranulation of rat basophilic leukemia (RBL-2H3) cells. A new neolignan glycoside, named pinusthunbergiside A (1), as well as six known neolignan glycosides (2-7) were isolated from the ethanolic extrac...
New antimicrobial pregnane glycosides from the stem of Ecdysanthera rosea.
Phytochemical investigation on the stem of Ecdysanthera rosea led to the isolation of eight new C-21 pregnane glycoside ecdysosides A-H (1-8), together with one known pregnane glycoside ecdysantheroside A (9). Their structures were elucidated based on extensive spectroscopic data (MS, IR, 1D and 2D...
¹H-qNMR for direct quantification of stachydrine in Leonurus japonicus and L. cardiaca.
(1)H-qNMR-spectroscopy was successfully applied to quantify the pharmacologically active alkaloid stachydrine ((2S)-1,1-dimethylpyrrolidinium-2-carboxylic-acid) in aerial parts of Leonurus japonicus (Leonuri herba, yimucao; Chin.Ph.2010, DAB2012) which are used in TCM and Kampo for the treatment of...
Baicalein decreases side population proportion via inhibition of ABCG2 in multiple myeloma cell line RPMI 8226 in vitro.
To investigate the effect of baicalein on side population in human multiple myeloma cell line RPMI 8226 and the underlying molecular mechanisms in vitro and in silico. MTT assay was applied to detect the anti-proliferation effect of baicalein. The detection of side population cells is based on the H...
Coumarinoids from the fruits of Micromelum falcatum.
Four new compounds, microminutin B (1), microminutin C (2), micromarinate (3), and secomicromelin (4) as well as 17 known compounds were isolated from the fruits of Micromelum falcatum. All compounds were evaluated for antifungal activity against Pythium insidiosum using disc diffusion assay. P. ins...
Diterpenoids from Isodon sculponeatus.
Phytochemical investigation of the aerial parts of Isodon sculponeatus afforded six new 7,20-epoxy-ent-kauranoids, sculponins U-Z (1-6), and 11 known diterpenoids (7-17). The structures of these new compounds were elucidated primarily by means of extensive spectroscopic analysis, and the absolute co...
Chaetoglobosin Y, a new cytochalasan from Chaetomium globosum.
Chaetoglobosin Y (1), was isolated from the endolichenic fungal strain Chaetomium globosum (No. 64-5-8-2), along with related six known cytochalasans, chaetoglobosin Fex (2), chaetoglobosin E (3), isochaetoglobosin D (4), chaetoglobosin G (5), cytoglobosin B (6), and cytoglobosin C (7). Their struct...