A new phenolic acid ester, 4'-hydroxyphenylethyl 4,8(R)-dihydroxyphenylpropionate(1), was isolated from an endophytic fungus Colletotrichum capsici of Paeonia lactiflora roots, along with eight known phenolic derivatives, tyrosol(2), 2-(4-hydroxyphenyl) ethyl acetate(3), methyl p-hydroxyphenylacetate(4), methyl m-hydroxyphenylacetate(5), 4-(4-hydroxyphene-thoxy)-4-oxobutanoic acid(6), 4-hydroxyphenethyl methyl succinate(7), trichodenol B(8) and 4-hydroxyphenethyl 2-(4-hydroxyphenyl) acetate(9). Their structures were identified by a combination of high-resolution electrospray ionization mass spectrometry(HR-ESI-MS), nuclear magnetic resonance(NMR) spectroscopy, ultraviolet(UV) spectroscopy and electronic circular dichroism(ECD) spectroscopy. Compounds 2-9 were isolated from this fungus for the first time.
Colletotrichum ; Esters ; Hydroxybenzoates ; Paeonia

The research of 108 patients taken organophosphate to kill oneself who were treated by the new regimen in which, pralidoxime (PAM) were indicated according to poisoning level and adjusted by two factors: the change of plasma ChE and the adjustment of essential atropine dose. The results were compared with control groups including 54 patients treated by old regimen. Age, sex and ChE activity characteristics in 2 groups when hospitalized were the same. Compared with control group, the patients of study group received higher doses of PAM. The doses are very different between the patients depending on poisoning level. Therefore, predictive indicators in patient group were better than controlled group, especially the mortality rate (1.85% vs. 13%). The regimen achieved good results
Phosphoric Acid Esters ; Mortality ; Phosphoric Acid Esters ; Poisoning

No abstract available.
Cholesterol Esters* ; Humans ; Infant, Newborn*

Esters ; urine ; Humans ; Phthalic Acids ; urine

The retinal pigment epithelium(RPE) is one of the most important cell layers in the visual system and is vital to the integrity of the rod and cone outer segments. It has many complex functions, such as absorption of light, storage and conversion of vitamin A esters and formation of acid- mucopolysaccharide complex. As serum in the vitreous cavity stimulates the migration and proliferation of RPE cells, serum is necessary to grow RPE cells in culture. Bovine RPE cells were cultured with various concentrations of fetal bovine serum(FBS 0%, 5%, 10%, 20%, 40%) to evaluate their effects on RPE cell growth. FBS stimulated the proliferation of bovine RPE ells in a dose-dependent manner, with maximal proliferation at 20% FBS. This proliferative effect, however, was suppressed at the highest concentration(40% FBS).
Absorption ; Epithelial Cells* ; Esters ; Retinaldehyde* ; Vitamin A

The workers in insecticide factory generally are exposed to organophosphate insecticide chemicals while working in the plants. We have investigated the effects of organophosphate insecticides on the activities of some erythrocyte antioxidant enzymes, total antioxidant status and lipid peroxidation in the blood of the insecticide producing workers. The results: (1) erythrocyte superoxide dismutase (SOD) and glutathione reductase (GR) activities were significantly depressed by 37.64% and 28.55%, respectively while serum cholinesterase (ChE) activity was only depressed by 13.47% as compared with an unexposed group; (2) erythrocyte glutathione peroxidase (GPx) was increased significantly; (3) serum total antioxidant status (TAS) was depressed by 9.86% (p>0.05). This preliminary study suggests that erythrocyte SOD may be a sensitive indicator of exposure to organophosphate insecticides.
Phosphoric Acid Esters ; Insecticides ; Erythrocytes ; Antioxidants

This paper analyzed the clinical data of 17 patients with inhalation dimethyl sulfate poisoning in Changzhou Third People's Hospital, in order to understand the clinical characteristics, treatment and prognosis of patients with inhalation dimethyl sulfate poisoning, and guide clinicians to make effective measures in time. Dimethyl sulfate poisoning progresses rapidly and dangerously. The prognosis is usually better if the patients are separated from the toxic environment as soon as possible, given glucocorticoids in early and short-term, closely observed respiratory tract injury, and treated with endotracheal intubation and invasive mechanical ventilation when necessary.
Humans ; Respiration, Artificial ; Sulfuric Acid Esters

Two new sucrose cinnamates(1 and 2) along with nine known compounds(3-11) were isolated from ethanol extract of Polygonum lapathifolium var. salicifolium by silica gel column chromatography, ODS column chromatography and semi-preparative HPLC. Their structures were elucidated by extensive spectroscopic methods including 1 D-and 2 D-NMR experiments, as well as HR-ESI-MS analysis. Eleven compounds(7 sucrose cinnamates, 3 phenylpropanoids and 1 lactone) were obtained and their structures were identified as(1,3-O-di-p-coumaroyl)-β-D-fructofuranosyl-(2→1)-α-D-glucopyranoside(1),(1,3-O-di-p-coumaroyl)-β-D-fructofuranosyl-(2→1)-(6-O-acetyl)-α-D-glucopyranoside(2),(3-O-feruloyl)-β-D-fructofuranosyl-(2→1)-(6-O-p-coumaroyl)-α-D-glucopyranoside(3), hydropiperoside(4), vanicoside C(5),(1,3-O-di-p-coumaroyl)-β-D-fructofuranosyl-(2→1)-(6-O-feruloyl)-α-D-glucopyranoside(6), vanicoside B(7),trans-p-hydroxycinnamic acid methyl ester(8), trans-p-hydroxycinnamic acid ethyl ester(9), methyl ferulate(10) and dimethoxydimethylphthalide(11), respectively. Compounds 1 and 2 were two new sucrose cinnamates, and compounds 1-11 were isolated from this plant for the first time. The antioxidant activities of the isolated compounds 1-9 were investigated by an oxygen radical absorbance capacity(ORAC) assay, and all nine compounds were found to show strong antioxidant activities. Among them, compound 6(10 μmol·L~(-1)) was the supreme one in antioxidant activities, with its ORAC value equivalent to(1.60±0.05) times of 50 μmol·L~(-1) Trolox.
Antioxidants ; Cinnamates ; Esters ; Molecular Structure ; Polygonum ; Sucrose

Five monoterpenoid compounds(1-5) were isolated and purified from the acetone fraction of the aqueous extract of Zingiberis Rhizoma Recens by MCI, Sephadex LH-20, silica gel, semi-preparative HPLC, and TLC. Their structures were identified with multiple spectroscopical methods including 1 D-NMR, 2 D-NMR, and MS. The five compounds were identified as(2E,6Z)-8-hydroxy-2,6-dimethylocta-2,6-dien-1-yl-(E)-3-(4-hydroxy-3-methoxyphenyl) acrylate(1),(2E,6E)-8-hydroxy-3,7-dimethylocta-2,6-die-noic acid(2),(E)-1,8-dihydroxy-3,7-dimethyl-2-octenoic acid(3), linalyl-β-D-glucopyranoside(4), and β-D-glucopyranoside-(2E)-3,7-dimethyl-2,6-octadien-1-yl(5), respectively.Compound 1 was a new monoterpene ester, and compounds 4-5 were isolated from this plant for the first time.
Chromatography, High Pressure Liquid ; Esters ; Monoterpenes ; Rhizome

This study explored the preservation effect of strigolactone analogs on Gastrodia elata tubers and screened out the suitable preservation measures of G. elata to provide a safer and more effective method for its storage and preservation. Fresh G. elata tubers were treated with 7FGR24, 2,4-D isooctyl ester, and maleic hydrazide, respectively. The growth of flower buds, the activities of CAT, and MDA, and the content of gastrodin and p-hydroxybenzyl alcohol were measured to compare the effects of different compounds on the storage and preservation of G. elata. The effects of different storage temperatures on the preservation of 7FGR24 were compared and analyzed. The gibberellin signal transduction receptor gene GeGID1 was cloned, and the effect of 7FGR24 on the expression level of GeGID1 was analyzed by quantitative polymerase chain reaction(qPCR). The toxicity of the G. elata preservative 7FGR24 was analyzed by intragastric administration in mice to evaluate its safety. The results showed that compared with 2,4-D isooctyl ester and maleic hydrazide, 7FGR24 treatment had a significant inhibitory effect on the growth of G. elata flower buds, and the CAT enzyme activity of G. elata was the highest, indicating that its preservation effect was stronger. Different storage temperatures had different effects on the preservation of G. elata, and the preservation effect was the strongest at 5 ℃. The open reading frame(ORF) of GeGID1 gene was 936 bp in length, and its expression level was significantly down-regulated after 7FGR24 treatment, indicating that 7FGR24 may inhibit the growth of flower buds by inhibiting the gibberellin signal of G. elata, thereby exerting a fresh-keeping effect. Feeding preservative 7FGR24 had no significant effect on the behavior and physiology of mice, indicating that it had no obvious toxicity. This study explored the application of the strigolactone analog 7FGR24 in the storage and preservation of G. elata and preliminarily established a method for the storage and preservation of G. elata, laying a foundation for the molecular mechanism of 7FGR24 in the storage and preservation of G. elata.
Animals ; Mice ; Gastrodia ; Gibberellins ; Maleic Hydrazide ; Esters