Five new terpenoids from Viburnum odoratissimum var. sessiliflorum / 中国天然药物

Five new terpenoids, including two vibsane-type diterpenoids (1, 2) and three iridoid allosides (3-5), together with eight known ones, were isolated from the leaves and twigs of Viburnum odoratissimum var.sessiliflorum. Their planar structures and relative configurations were determined by spectroscopic methods, especially 2D NMR techniques. The sugar moieties of the iridoids were confirmed as β-D-allose by GC analysis after acid hydrolysis and acetylation. The absolute configurations of neovibsanin Q (1) and dehydrovibsanol B (2) were determined by quantum chemical calculation of their theoretical electronic circular dichroism (ECD) spectra and Rh2(OCOCF3)4-induced ECD analysis. The anti-inflammatory activities of compounds 1, 3, 4, and 5 were evaluated using an LPS-induced RAW264.7 cell model. Compounds 3suppressed the release of NO in a dose-dependent manner, with an IC50 value of 55.64 μmol·L-1. The cytotoxicities of compounds 1-5 on HCT-116 cells were assessed and the results showed that compounds 2 and 3 exhibited moderate inhibitory activities with IC50 values of 13.8 and 12.3 μmol·L-1, respectively.

Geranylated or prenylated flavonoids from Cajanus volubilis / 中国天然药物

Five new flavonoid derivatives, cajavolubones A-E (1-5), along with six known analogues (6-11) were isolated from Cajanus volubilis, and their structures were elucidated by spectroscopic analysis and quantum chemical calculations. Cajavolubones A and B (1 and 2) were identified as two geranylated chalcones. Cajavolubone C (3) was a prenylated flavone, while cajavolubones D and E (4 and 5) were two prenylated isoflavanones. Compounds 3, 8, 9 and 11 displayed cytotoxicity against HCT-116 cancer cell line.

Constituents from the bark of Annona squamosa and their anti-tumor activity / 中国中药杂志

<p><b>OBJECTIVE</b>To investigate the constituents of the Annona squamosa and evaluate their anti-tumor activity.</p><p><b>METHOD</b>The compounds were isolated and purified by various column chromatography. Their structures were elucidated by spectral data analysis. Their anti-tumor activity was assayed by SRB method.</p><p><b>RESULT</b>Eleven compounds were obtained from the 95% EtOH extract. The structures were determined as: annosquamosin C(1),15, 16-epoxy-17-hydroxy-ent-kau-ran-19-oic acid (2),16,17-dihydroxy-ent-kau-ran-19-oic acid(3), annosquamosin A(4), ent-kaur-16-en-19-oic acid (5), 19-nor-ent-kauran4-ol-17-oic acid (6),16-hydroxy ent-kau ran-19-oic acid (7), ent-15beta-hydroxy-kaur-16-en-19-oic acid (8), annosquamosin B (9), ent-16beta, 17-dihydroxykauran-19-al (10), 16, 17-dihydroxy-ent-kauran-19-oic acid me thyl ester (11). Compounds 1,2,3,5,9 showed different inhibitory activities against 95-D lung cancer cells,the effect of compound 5 was strongest with the IC50 value 7.78 micromol x L(-1); Compounds 2, 5, 9 showed inhibitory activities against A2780 ovarian cancer cells, the effects of compounds 2 and 9 were strong with the IC50 values being 0.89, 3.10 micromol x L(-1), respectively.</p><p><b>CONCLUSION</b>Compound 2 was firstly isolated from this family, while compound 8 and 10 were first found from this genus and the title species, respectively. The in vitro anti-tumor test showed compound 5 significantly inhibited 95-D lung cancer cells and compounds 2 and 9 exhibited remarkbale activity against A2780 ovarian cancer cells.</p>

Simultaneous determination of five flavonoid compounds in leaves of Adinandra nitida by HPLC-PAD / 中国中药杂志

<p><b>OBJECTIVE</b>To established a novel HPLC-PAD method for the simultaneous determination of five compounds (camellianin A, camellianin B, apigenin, quercitrin, epicatechin) in leaves of Adinandra nitida.</p><p><b>METHOD</b>These compounds were effectively separated on a reversed-phase C18 column (4.6 mm x 250 mm, 10 microm) with the column temperature at 25 degrees C. The mobile phase was composed of 0.1% aqueous formic acid and methanol. The flow rate was 1.0 mL x min(-1), the detection wavelength was set at 280 nm before 15 min for detecting epicatechin and at 262 nm from 15 to 40 min for detecting the rest four compounds.</p><p><b>RESULT</b>All the linearities were good (r > 0.9991) within their test ranges. The established method showed good precision with overall intra-day and interday RSD values less than 3.33% and 3.2%, respectively. The average recoveries were in the range of 96.08% to 100.30% with RSD from 2.0% to 4.0%. The limits of detection (LOD) and quantification (LOQ) in the range of ranged from 0.9 to 5.6 ng and 3.0 to 19.0 ng, respectively.</p><p><b>CONCLUSION</b>This established method can be applied to evaluate the intrinsic quality of the leaves of A. nitida.</p>

Simultaneous determination of three sesquiterpene lactones in Radix Linderae by HPLC / 中国中药杂志

<p><b>OBJECTIVE</b>To develop an HPLC method for simultaneous determination of three major sesquiterpene lactones in Radix Linderae.</p><p><b>METHOD</b>The chromatographic separation was achieved on a Diamonsil C18 column (4.6 mm x 250 mm, 5 microm) using isocratic elution of acetonitrile-water (containing 0.1% H3 PO4) (45 : 55) at a flow rate of 1.0 mL x min(-1). Detection was carried out using a photodiode array detector at 220 nm.</p><p><b>RESULT</b>The calibration curves were linear in the range of 0.001 8-0.036 0 g x L(-1) for hydroxylinderstrenolide (R2 = 0.999 8), 0.016 2-0.323 2 g x L(-1) for neolinderalactone (R2 = 0.999 9), 0.010 5-0.209 9 g x L(-1) for linderane (R2 = 0.999 9), respectively. The average recoveries were 100.0% for hydroxylinderstrenolide, 98.8% for neolinderalactone and 98.9% for linderane with RSD not more than 3.3%.</p><p><b>CONCLUSION</b>The established method was proved to be simple, sensitive and credible, and can be applied to quality control of Radix Linderae.</p>