C-Labdane diterpenoid alkaloids bearing a rare skeleton with anti-inflammatory and anti-oxidant activities from Forsythia suspensa.

Two undescribed C-Labdane diterpenoid alkaloids, named forsylinfenines A and B (1-2), attributable to a rare 4,4,10,13-tetramethyl-1(2),3(4),5(10),6(7)-octahydrobenzo[f]quinolin skeleton, along with three known β-carboline-type alkaloids (3-5), were isolated. The chemical structures including absolute configurations of two undescribed compounds were established by means of integrated spectroscopic techniques and electronic circular dichroism (ECD) calculations. In addition, a plausible biosynthetic pathway for the formation of compounds 1 and 2 was proposed.

Sesquiterpenes from the endophytic fungus sp. F-31.

One new eremophilane sesquiterpene periconianone L (), together with four known guaiane-type sesquiterpenes 4,10,11-trihydroxyguaiane (), (-)-guai-1(10)-ene-4,11-diolhydroxymecuration (), guaidiol A (), and epi-guaidiol A () were isolated from the endophytic fungus sp. F-31. The structure of the new compound was established by spectroscopic methods, including UV, IR, HRESIMS, and extensive NMR techniques.

Roseomonas globiformis sp. nov., an airborne bacteria isolated from an urban area of Beijing.

A novel dark pink pigmented bacterium, designated strain CPCC 100847 (deposited with strain code 0113-15), was isolated from the urban air of Beijing, China. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain CPCC 100847 was related to members of the genus Roseomonas and had the highest 16S rRNA gene sequence similarity to Roseomonas aestuarii JC17 (97.5 %).

Metabolites from the Plant Endophytic Fungus Aspergillus sp. CPCC 400735 and Their Anti-HIV Activities.

Thirty-three metabolites including five phenalenone derivatives (1-5), seven cytochalasins (6-12), thirteen butenolides (13-25), and eight phenyl derivatives (26-33) were isolated from Aspergillus sp. CPCC 400735 cultured on rice. The structures of all compounds were elucidated by NMR, MS, and CD experiments, of which 1-5 (asperphenalenones A-E), 6 (aspochalasin R), and 13 (aspulvinone R) were identified as new compounds.

Four new monoterpenoids from an endophytic fungus Periconia sp. F-31.

Five monoterpenoids were isolated from the endophytic fungus Periconia sp. F-31, including three new carene-type monoterpenoids, 2-carene-5,8-diol (1), 2-carene-8,10-diol (2), 2-carene-8-acetamide (3), one new menthene-type monoterpenoid 8-hydroxy-1,7-expoxy-2-menthene (4), and one known monoterpenoid anethofuran (5). The structures of all compounds were elucidated based on a comprehensive spectroscopic data analysis, electronic circular dichroism (ECD), and calculated ECD.

[A new lactone derivative from plant endophytic fungus Periconia sp. F-31].

To investigate the secondary metabolites of endophytic fungi Pericinia sp. F-31. Column chromatography on silica gel, Sephadex LH-20 and semi-preparative HPLC were used to separate and purify the compounds.

Regio-selective deglycosylation of icariin by cell suspension cultures of Glycyrrhiza uralensis and Morus alba.

Biotransformations of icariin (1) by cell suspension cultures of Glycyrrhiza uralensis and Morus alba yielded two new metabolites, icaruralins A and B (2 and 3), and one known metabolite, baohuoside I (4). Their structures were determined on the basis of extensive spectroscopic analysis. This is the first report that the cell suspension cultures of G.

New 2-arylbenzofuran metabolite from cell cultures of Morus alba.

A new 2-arylbenzofuran compound, 5-dehydroxy-moracin U (1), along with 10 known compounds (2-11), were isolated from cell cultures of Morus alba. Their structures were elucidated on the basis of extensive spectroscopic analyses. The anti-inflammatory activity assay of 1-8 showed that 2 and 8 exhibited significant inhibitory effect on LPS-induced NO production with the values of 76.

Two new diterpenoids from cell cultures of Salvia miltiorrhiza.

A new spiroketallactone, epi-danshenspiroketallactone A (1) and a new C18-norditerpenoid, normiltioane (2) along with 21 known compounds, were isolated from cell cultures of Salvia miltiorrhiza. Their structures were elucidated on the basis of extensive spectroscopic analyses. In the in vitro assays, the compounds 9-11, 21-23 exhibited the significant antitumor activity with the IC(50) ranges of 1.

[Chemical constituents from cell cultures of Morus alba].

The column chromatography on silica gel, Sephadex LH-20 and semi-preparative HPLC were used to separate and purify the compounds from the EtOAc extract of medium and MeOH extract of cell cultures of Morus alba. Eight compounds were isolated. Based on physico-chemical properties and spectroscopic data, their structures were identified as isobavachalcone (1), genistein (2), norartocarpetin (3), albanin A (4), guangsangon E (5), mulberrofuran F (6), chalcomoracin (7), kuwanon J (8).

New abietane norditerpenoid from Salvia miltiorrhiza with cytotoxic activities.

One new abietane-type norditerpenoid, named militibetin A (1), was isolated from the dry roots of Salvia miltiorrhiza, along with two known diterpenoids, yunnannin A (2) and ferruginol (3). Their structures were established by means of extensive spectroscopic analyses. In vitro, compounds 1-3 were found to show cytotoxicities against selected cancer cells, including P-388, HONE-1, and HT-29, and gave ED(50) values in the range of 2.

Two new terpenoids from endophytic fungus Periconia sp. F-31.

Two new terpenoids, (+)-(3S,6S,7R,8S)-periconone A (1) and (-)-(1R,4R,6S,7S)-2-caren-4,8-olide (2), have been isolated from an endophytic fungus Periconia sp., which was collected from the plant Annona muricata. Their structures were elucidated on the basis of extensive spectroscopic analyses.

Solalyratins A and B, new anti-inflammatory metabolites from Solanum lyratum.

A new coumestan (solalyratin A, 1) and a novel cyclic eight-membered α,β-unsaturated ketone (solalyratin B, 3), together with three known compounds, puerariafuran (2), coumestrol (4) and 9-hydroxy-2',2'-dimethylpyrano[5',6':2,3]-coumestan (5), were isolated from the whole plant of Solanum lyratum. Their structures were elucidated on the basis of spectroscopic analyses. In vitro, compounds 1-5 showed anti-inflammatory activities, with IC(50) values in the range 6.

New norditerpenoid alkaloids from Scutellaria barbata with cytotoxic activities.

Two new norditerpenoid alkaloids, named scutebarbatines M-N (1 and 2), were isolated from the whole plant of Scutellaria barbata D. Don. Their structures were established on the basis of detailed spectral analyses.

New anti-inflammatory 4-hydroxyisoflavans from Solanum lyratum.

Three new 4-hydroxyisoflavans, named lyratin A (1), lyratin B (2) and lyratin C (3), along with a known compound, 4,7,2'trihydroxy-4'-methoxyisoflavan (4), were isolated from the whole plant of Solanum lyratum. Their structures were established by means of detailed physical data analyses. In vitro, four compounds showed anti-inflammatory activities with inhibitory ratios of release of beta-glucuronidase from polymorphonuclear leukocytes of rats in the range of 30.

New neo-clerodane diterpenoids from Scutellaria barbata with cytotoxic activities.

Two new neo-clerodane diterpenoids have been isolated from the whole plant of Scutellaria barbata D. Don, and their structures were established by detailed spectral analyses as scutehenanine H (1) and 6-(2,3-epoxy-2-isopropyl-n-propoxyl)barbatin C (2). In vitro, the isolated two new compounds showed significant cytotoxic activities against three human cancer lines, and gave IC(50) values in the range OF 2.

Cytotoxic neo-clerodane diterpenoid alkaloids from Scutellaria barbata.

Six new neo-clerodane diterpenoid alkaloids, named scutehenanines A-D (1, 4, 5, 6), 6-O-acetylscutehenanine A (2), and 6-O-(2-carbonyl-3-methylbutanoyl)scutehenanine A (3), were isolated from the whole plant of Scutellaria barbata. Their structures were established on the basis of detailed physical data analyses. In vitro, the six new isolated compounds showed cytotoxic activities against three human cancer lines (HONE-1 nasopharyngeal, KB oral epidermoid carcinoma, and HT29 colorectal carcinoma cells) and gave IC50 values in the range 2.

Two new neo-clerodane diterpenoid alkaloids from Scutellaria barbata with cytotoxic activities.

Two new neo-clerodane diterpenoid alkaloids, scutebarbatine O (1) and 6-O-nicotinoylscutebarbatine G (2), were isolated from the whole plant of Scutellaria barbata. Their structures were elucidated by spectroscopic methods including extensive 1D and 2D NMR analyses. In vitro, compounds 1 and 2 showed cytotoxic activities against three human tumor cell lines, namely, HONE-1 nasopharyngeal, KB oral epidermoid carcinoma, and HT29 colorectal carcinoma cells, and with IC(50) values in the range of 2.

Two new sesquiterpenoids from Solanum lyratum with cytotoxic activities.

Two new sesquiterpenoids, lyratol C (1) and lyratol D (2), together with two known sesquiterpenoids, dehydrovomifoliol (3) and blumenol A (4), were isolated from the whole plant of Solanum lyratum. Their structures were established by spectroscopic analyses. In vitro, the four compounds showed significant cytotoxic activities against three human cancer cell lines, namely, HONE-1 nasopharyngeal, KB oral epidermoid carcinoma, and HT29 colorectal carcinoma cells, and gave IC(50) values in the range 3.

New alkaloids from Forsythia suspensa and their anti-inflammatory activities.

Two new alkaloids, named suspensine A (1) and (-)-7'-O-methylegenine (2), along with two known alkaloids, (-)-egenine (3) and (-)-bicuculline (4), were isolated from the ethanolic extract of the fruits of Forsythia suspensa. Their structures were established by means of chemical methods and spectroscopic analyses. In vitro, four alkaloids showed anti-inflammatory activities, with inhibition rates of release of beta-glucuronidase from polymorphonuclear leukocytes of rats being in the range 34.