Chemical constituents from the stem of .

A new biphenyl compound: 5-aldehyde-4'-hydroxy-2,2'-dimethoxybiphenyl (), along with 11 known phenolic compounds () were isolated from the stem of Linn. Their structures were established by spectroscopic methods, including MS, UV, IR, 1 D and 2 D NMR. Compounds and showed weakly cytotoxicity against MCF-7, with IC values of 32.

A new isoflavone from the fruits of and its antibacterial activity.

A new isoflavone ()-5,7,4'-trihydroxy-3'-[3-hydroxy-3-methyl-1-butenyl] isoflavone () together with seven known isoflavones () were isolated from the fruits of the . Their structures were established on the basis of 1 D, 2 D-NMR spectroscopic data and HR-ESI-MS analysis. All compounds were evaluated for their antibacterial activities against five pathogenic bacteria .

Phenolic glycosides from the stems of Homalium stenophyllum.

The phytochemical investigation of the stems of Homalium stenophyllum afforded seven new phenolic glycosides (1-5 and 8-9) and two known compounds (6 and 7). Their structures were elucidated by comprehensive analyses of NMR spectroscopic, mass spectrometric data and chemical hydrolysis. Additionally, their anti-inflammatory activities against the NO production in LPS-induced macrophages were evaluated.

Two new 2,5-diketopiperazine derivatives from mangrove-derived endophytic fungus S30.

Two new 2,5-diketopiperazines derivatives (), together with eight known analogs (), were isolated from a culture broth of an endophytic fungus S30, derived from mangrove . Their complete structures were determined by a detailed analysis of spectroscopic data and ECD calculations. The antimicrobial activity and neuroprotective activity of these isolated compounds were also evaluated.

One new piperazinedione isolated from a mangrove-derived fungus JX-5.

One new piperazinedione derivative, nigerpiperazine A (), along with six known compounds () were isolated from the fungus JX-5 from mangrove . Nigerpiperazine A () was elucidated by spectroscopic analyses and C NMR chemical shift calculations, compounds and were determined by X-ray and the CD spectra. The absolute configuration of was identified by X-ray for the first time.

Three new methylated Δ-pregnene steroids from the Polyalthia laui-derived fungus Stemphylium sp. AZGP4-2.

Three new methylated Δ-pregnene steroids, stemphylisteroids A-C (1-3) were isolated from the medicinal plant Polyalthia laui-derived fungus Stemphylium sp. AZGP4-2. Their structures were elucidated by the detailed analysis of comprehensive spectroscopic data.

Two new cephalochromin derivative from the sp. ZG22.

Two new cephalochromin derivatives, prenylcephalochromin A (), prenylcephalochromin B (), along with cephalochromin () were isolated from the sp. ZG22 obtained from a collected from the Hainan. The structures of two new compounds were elucidated by comprehensive spectroscopic methods.

Extraction, characterization and antioxidant activity of polysaccharide from Pouteria campechiana seed.

In this study, the seed polysaccharides (PCSP) was ultrasonic-assisted extracted from Pouteria campechiana and optimized by response surface method (RSM). After separation and purification by DEAE-52 cellulose column and Sephadex G-75 glucan gel column, the pure polysaccharide component of PCSPa-1 was obtained, and its structure and antioxidant activity were analyzed. The results showed that the optimal parameters of PCSP with maximum yields (15.

Aristololactam alkaloids from the roots of .

A novel aristololactam alkaloid, dasymalactam A (), together with nine known analogues (), were isolated from the roots of . Their structures were elucidated by IR, NMR and MS spectrums and comparisons with data reported in the literature. All compounds demonstrated weak cytotoxicity against Hela, MCF-7, A-549, MGC-803, and COLO-205 human cancer cell lines.

3,4- seco-Norclerodane Diterpenoids from the Roots of Polyalthia laui.

Ten new clerodane diterpenoids, polylauioids A-J (1-10), and five known analogues (11-15) were isolated from the roots of Polyalthia laui. Among the new compounds, 3 and 8 are artifacts. The structures were elucidated using spectroscopic methods and by comparison with published NMR spectroscopic data.

One new Lignan derivative from the fruiting bodies of Ganoderma lipsiense.

One new lignan derivative 2,3-dimethyl-4-(4'-hydroxy-3',5'-dimethoxyphenyl)-6-hydroxy-7-methoxy-naphthalene (), together with four known analogues (), were isolated from acetone extract of the fruiting bodies of collected in the Hainan Province, China. Their structures were elucidated by the detailed analysis of comprehensive spectroscopic data. Compound showed insecticidal activity against newly hatched karvae of .

Furofuran lignans and alkaloids from Clinacanthus nutans.

One new furofuran lignan 2-methoxy-9β-hydroxydiasesamin (1), and four analogues (2-5), together with eight alkaloids (6-13), were isolated from the ethanol extract of the aerial part of Clinacanthus nutans. Their structures were elucidated by the detailed analysis of comprehensive spectroscopic data. All the compounds were isolated from the genus of Clinacanthus for the first time.

A new norisoprenoid from the leaves of Ficus pumila.

One new norisoprenoid 3,9-dihydroxy dihydro actinidiolide (1), together with eleven known compounds (2-12), were isolated from ethanol extract of the leaves of Ficus pumila collected in Hainan Province, China. Their structures were elucidated by the detailed analysis of comprehensive spectroscopic data. Compounds 1, 2, 4, 5, 8 and 10-12 were isolated from the F.

Penicilindoles A-C, Cytotoxic Indole Diterpenes from the Mangrove-Derived Fungus Eupenicillium sp. HJ002.

Three new indole diterpenes, penicilindoles A-C (1-3), were isolated from the mangrove-derived fungus Eupenicillium sp. HJ002. Their planar structures and absolute configurations were determined by interpretation of NMR spectroscopic data, HR-ESIMS, and X-ray diffraction analysis using Cu Kα radiation.

Bioactive Phenolic and Isocoumarin Glycosides from the Stems of Homalium paniculiflorum.

Two new phenolic glycosides ( and ) and two new isocoumarin glycosides ( and ), along with 14 known compounds (-), were isolated from the stems of . Their structures were established on the basis of extensive spectroscopic analyses and chemical methods. All new compounds were evaluated for their anti-inflammatory activities via examining the inhibitory activity on nitric oxide (NO) production induced by lipopolysaccharide (LPS) in mouse macrophage RAW 264.

Biologically active oligostilbenes from the stems of and chemotaxonomic significance.

Phytochemical investigation of the stems of (Dipterocarpaceae) led to the isolation and structural elucidation of twenty-seven oligostilbenes (), including a new natural compound . The structure of was elucidated on the basis of spectroscopic analyses including NMR, MS and ECD data, and the known compounds were identified by comparisons with those reported in the literature. The absolute configuration of was first time determined by a combination of NOESY spectrum and quantum chemical computation.

Two new secondary metabolites from a mangrove-derived fungus Cladosporium sp. JJM22.

Two new compounds (1 and 2), together with six known compounds (3-8), were obtained from the Cladosporium sp. JJM22, an endophytic fungus isolated from the stem bark of the mangrove plant Ceriops tagal collected in South China Sea. Their structures were elucidated on the basis of detailed spectroscopic analysis.

Eudesmanolides and Other Constituents from the Flowers of Wedelia trilobata.

Two eudesmane sesquiterpene lactones, wedetrilides B (1) and C (2), along with five known analogues (3 - 8), an ent-kaurane diterpenoid (9), a steroid (10), as well as cinnamic acid derivatives (11 - 13), were isolated from the flowers of Wedelia trilobata. Their structures were elucidated on the basis of extensive spectroscopic analyses and by comparison of their NMR data with those of related compounds. Furthermore, the structures of 1 and 3 - 5 were confirmed by X-ray single-crystal diffraction analyses.

Dendrocoumarin: a new benzocoumarin derivative from the stem of Dendrobium nobile.

A new benzocoumarin derivative, dendrocoumarin (1), along with itolide A were isolated from the stems of Dendrobium nobile. The structure of the new compound 1 elucidated on the basis of NMR and mass spectroscopic data. Compounds 1 and 2 showed broad spectrum antibacterial activity against five terrestrial pathogenic bacteria.

A new12-membered lactone from the stems of Ficus auriculata.

A new lactone ficusine D (1), together with six known compounds (2-7) were isolated from the stems of the Ficus auriculata. The new compound 1 was a rare 12-membered lactone containing a quinone ring skeleton. The structure of the 1 was elucidated by comprehensive spectroscopic data.

[Sesquiterpenes from Artabotrys hongkongensis].

The chemical consituents from Artabotrys hongkongensis were separated and purified by column chromatographies with silica gel, Sephadex LH-20, ODS and RP-HPLC. The structures of the isolated compounds were identified on the basis of physicochemical properties and spectroscopic analysis, as well as comparisons with the data reported in the literature. As a result, 16 sesquiterpenes were isolated and elucidated as blumenol A (1), 4, 5-dihydroblumenol A (2), (6R, 9S)-3-oxo-a-ionol (3), 3-hydroxy-β-ionone (4), dehydrovomifoliol (5), (3R, 6R, 7E) -3-hydroxy-4, 7-megastigmadien-9-one (6), sarmentol F (7), 10-oxo-isodauc-3-en-15-oic acid (8), fukinone (9), petasitolone (10), β-eudesmol (11), trans-3β-(1-hydroxy-1-methylethyl)- 8aβ-methyl-5-methylenedecalin-2-one (12), 10-hydroxyaristolan-9-one (13), aristol-8-en-1-one (14), aristolan-9-en-1-one (15), and aristolan-1, 9-diene (16).

A new dihydrochalcone glycoside from the stems of Homalium stenophyllum.

A new dihydrochalcone glycoside, phloretin-4-O-β-D-glucopyranoside (1), together with seven known flavonoids (2-8), were isolated from the stems of Homalium stenophyllum. The structure of 1 was elucidated by extensive spectroscopic methods and the known compounds were identified by comparisons with data reported in the literature. The known compounds (2-8) were isolated from the genus Homalium for the first time.

A new isoflavone from the roots of Ficus auriculata.

A new isoflavone, 5,7,4'-trihydroxy-3'-hydroxymethylisoflavone (1), together with three known isoflavones, 3'-formyl-5,4'-dihydroxy-7-methoxyisoflavone (2), ficuisoflavone (3) and alpinumisoflavone (4), were isolated from the roots of Ficus auriculata. Among them, 1 is a rare isoflavone containing 16 carbon atoms on the carbon skeleton. The structure of 1 was elucidated by extensive spectroscopic methods and the known compounds were identified by comparisons with data reported in the literature.

A new biphenyl derivative from the mangrove endophytic fungus Phomopsis longicolla HL-2232.

A new biphenyl derivative 5,5'-dimethoxybiphenyl-2,2'-diol (1), together with five known compounds (2-5), was isolated from the mangrove endophytic fungus Phomopsis longicolla HL-2232. The structures of these compounds were elucidated using comprehensive spectroscopic methods. The absolute configuration of 4 was determined by single-crystal X-ray diffraction for the first time.