Polyketide Derivatives, Guhypoxylonols A-D from a Mangrove Endophytic Fungus sp. GXNU-Y45 That Inhibit Nitric Oxide Production.

Four undescribed compounds, guhypoxylonols A (), B (), C (), and D (), were isolated from the mangrove endophytic fungus sp. GXNU-Y45, together with seven previously reported metabolites. The structures of - were elucidated based on analysis of HRESIMS and NMR spectroscopic data.

Bioactivity-guided isolation of anti-inflammatory constituents from the bark of Streblus zeylanicus.

Based on anti-inflammatory activity to evaluate the effects to the release of NO, bio-assay guided separation of the bark of Streblus zeylanicus led to identify fifteen compounds, including four new terpenes (1, 2, 9, and 10), one new pentanoid glycoside (12), one new rumenic ester (13), together with nine known compounds (3-8, 11, 14, and 15). Their structures were elucidated using extensive NMR and HRESIMS spectroscopic data analyses. The stereochemistry of compound 10 was established by comparing the calculated and experimental ECD spectroscopic data.

A new sesquiterpene from mangrove endophytic fungus sp. GXNU-MA1.

A new sesquiterpene, gxsespene A (1), and four known sesquiterpene derivatives were isolated from the mangrove endophytic fungus sp. GXNU-MA1. Their structures were elucidated based on high-resolution electrospray ionization mass spectroscopy (HR-ESI-MS) datum, extensive nuclear magnetic resonance (NMR) spectroscopic analysis, and comparison with literature data.

A new depsidone derivative from mangrove endophytic fungus sp. GXNU-A9.

A new tetracyclic depsidone derivative, guanxidone A (), together with three known metabolites -, was isolated from the mangrove endophytic fungus sp. GXNU-A9. The structure of compound was established by HR-ESI-MS, 1 D and 2 D NMR data, as well as by comparison with literature data.

3,4--Dammarane Triterpenoid Saponins with Anti-Inflammatory Activity Isolated from the Leaves of .

is commonly used for the prevention and treatment of hypertension, diabetes, and inflammation in South China. Although research on the anti-inflammatory effects of leaves has been reported, no active anti-inflammatory compounds have been identified. In the present study, RAW 264.

Cytochalasins from endophytic sp. GDG-118.

The plant , possessed a range of active compounds, was traditionally used in the medicine of Chinese minorities. Endophytic fungi were isolated from this plant, of which the fungus sp. GDG-118 was fermented and extracted with methanol.

Cytotoxic Activity and Related Mechanisms of Prenylflavonoids Isolated from Mallotus conspurcatus Croizat.

Five prenylflavonoids, 6-prenylnaringenin (1), 8-prenylnaringenin (2), 7-O-methyl-8-prenylnaringenin (3), 7-O-methyl-6-prenylnaringenin (4), and 4'-O-methyl-6-prenylnaringenin (5), were isolated from the traditional herb Mallotus conspurcatus Croizat (Euphorbiaceae). Compounds 1-5 revealed cytotoxic activity against cervical cancer (HeLa) cells with IC values ranging from 10.08 to 60.

Discovery of anti-inflammatory terpenoids from Mallotus conspurcatus croizat.

Ethnopharmacological Relevance: Mallotus conspurcatus croizat (Euphorbiaceae), a plant native to Jinxiu in Guangxi, is popularly used in folk medicine to treat pelvic inflammatory disease. The anti-inflammatory activities of the compounds obtained from M. conspurcatus root were evaluated in this study.

Anti-inflammatory lignans and phenylethanoid glycosides from the root of Isodon ternifolius (D.Don) Kudô.

Five undescribed lignans, three undescribed phenylethanoid glycosides and eight known compounds were isolated from the root of Isodon ternifolius (D.Don) Kudô (Lamiaceae). The structures of all of the isolated constituents were characterized by physical data analyses including NMR, MS and ECD.

Eremophilane sesquiterpenes from the endophytic fungus Xylaria sp. GDG-102.

A new eremophilane sesquiterpene, xylareremophil (1), together with five known eremophilanes, 1α,10α-epoxy-3α-hydroxyeremophil-7(11)-en-12,8β-olide (2), 1,10α,13-trihydroxyeremophil-7(11)-en-12,8-olide (3), 1α,10α-epoxy-13-hydroxyeremophil-7(11)-en-12,8β-olide (4), mairetolides B (5) and G (6) were isolated from the endophytic fungus Xylaria sp. GDG-102 cultured from Sophora tonkinensis. Their structures were elucidated on the basis of spectroscopic data analysis.

Two new coumarins from the bark of Streblus indicus (Bur.) Corner.

Two new coumarins 7-O-(6-O-(5-O-3,4,5-tri-methoxycinnamate-β-d-apiofuranosyl-β-d-glucopyranosyl)-6-methoxy coumarin (1) and 7-O-(6-O-(4-(2-hydroxy-1-hydroxymethyl-ethoxy)-3-methoxy-cinnamyl)-β-d-glucopyranosyl)-6-methoxy coumarin (2), along with 10 known metabolites, were isolated from the bark of Streblus indicus, their structures were identified by comparison of experimental and published spectroscopic data. (S)-marmesinin (6) and scoparone (7) exhibited moderate antimicrobial activity in vitro against Staphylococcus aureus strain with the MIC values of 62.5 and 125.

Structural Characterization and Assessment of the Cytotoxicity of 2,3-Dihydro-1H-indene Derivatives and Coumarin Glucosides from the Bark of Streblus indicus.

A pair of enantiomers and a pair of 2,3-dihydro-1H-indene epimers, rac-indidene A (rac-1), indidenes B and C (2, 3); four new coumarin glucosides (4-7); and four known coumarin glucosides (8-11) were isolated from the bark of Streblus indicus (Bur.) Corner. The structures of 1-11 were defined by physical data analyses, including MS, NMR, and single-crystal X-ray diffraction.

[Changes of AFP and beta-hCG in testicular tumors analyzed by a function method].

Objective: To establish a new function method for the analysis of a-fetoprotein (AFP) and beta-hCG in testicular tumors.

Methods: We reexamined the serum levels of AFP and beta-hCG after radical orchiectomy, and calculated the measured coordinate, with the abscissa representing the number of the half-lives of tumor markers, and the ordinate representing the measured value of tumor markers. Referring to the measured value of tumor markers before surgery as a, the number of half-lives as x, and their theoretical value over a period of x elimination half-lives as y (logarithm to the base 2 of y), we calculated the predicted coordinate according to the formula y = log2(a/2x) ==> x + y = log2a (function 1).