首次采用反相高效液相色谱法测定茜草根中1,3,6-trihydroxy-2-methylanthraquinone-3-O-[3-O-acetyl-α-L-rhamnopyranosyl-(1→2)-β-D-glucopyranoside]的含量。色谱柱为Purospher star RP C18色谱柱(250mm×4.6mm,5μm),流动相...首次采用反相高效液相色谱法测定茜草根中1,3,6-trihydroxy-2-methylanthraquinone-3-O-[3-O-acetyl-α-L-rhamnopyranosyl-(1→2)-β-D-glucopyranoside]的含量。色谱柱为Purospher star RP C18色谱柱(250mm×4.6mm,5μm),流动相为甲醇:水:四氢呋喃(65:34.7:0.3),流速为1.0mL/min,检测波长为276nm,柱温为25℃。该方法的线性范围为0.020~0.160μg,r=0.9998,平均回收率为101.5%,RSD为2.0%(n=6)。该方法测定1,3,6-trihydroxy-2-methylanthraquinone-3-O-[3-O-acetyl-α-L-rhamnopyranosyl-(1→2)-β-D-glucopyranoside]含量灵敏、准确、重现性好。展开更多
Delonix elata L.is a Ceasalpinaceae species and is traditionally used in India for treatment of skin diseases,liver diseases and rheumatic problems.However,systematic evaluation of its wound healing activity is lackin...Delonix elata L.is a Ceasalpinaceae species and is traditionally used in India for treatment of skin diseases,liver diseases and rheumatic problems.However,systematic evaluation of its wound healing activity is lacking.Thus,in the present study,we aimed to assess the wound healing activity of D.elata stem bark extract(DSE) and its isolated constituent quercetin-3-rhamnopyranosyl-(1-6) glucopyranoside(QRPG) in rats.The formulations effects on wound healing were assessed by the wound contraction rate,epithelialization period,tensile strength,content of the hydroxyproline,hexosamine and uronic acid in granulation tissue,histopathological studies and Col 1 α(I) expression level in wound tissue by reverse transcription polymerase chain reaction(RT-PCR) study.The topical application of DSE ointment caused faster epithelialization,significant wound contraction(100%),and better tensile strength(710.5 ± 10.5 g/cm^2),while QRPG showed wound epithelialization with 98.2%contraction,better than that of the control group(78.18%).The biochemical analysis of granulation tissue revealed that DSE and QRPG significantly increased hydroxyproline,hexosamine and uronic acid content.A significant increase in the expression of Col 1 α(I) was observed in the wound tissue of DSE and QRPG treated rats.DSE and QRPG were shown to enhance wound healing by increasing collagen synthesis through upregulation of Col 1 α(I),thus validating ethnomedicinal uses.展开更多
Propyl O-(α-L-rhamncpyranosyl)-(1→3)-[2,4-di-O-(2s-methylbutyryl)-α-L-rham-nopyranosyl]-(1→2)-(3-O-acetyl-β-D-glucopyranosyl)-(1→2)-β-D-fucopyranoside (1), the tetrasac-charide moiety of Tricolorin A, was synth...Propyl O-(α-L-rhamncpyranosyl)-(1→3)-[2,4-di-O-(2s-methylbutyryl)-α-L-rham-nopyranosyl]-(1→2)-(3-O-acetyl-β-D-glucopyranosyl)-(1→2)-β-D-fucopyranoside (1), the tetrasac-charide moiety of Tricolorin A, was synthesized in total 23 steps with a longest linear sequence of 10 steps, and overall yield of 3.7% from D-Glucose. The isomerization of the dioxolane-type berzyli-dene in the presence of NIS/AgOTf was observed. Tetrasaccharide 1 exhibited no activity against the cultured P388 cell as Tricolorin A did.展开更多
A new ionone glycoside (6R,9R)-blumenyl α-L-rhamnopyranosyl-(1 → 6)-β-D-gluco-pyranoside (1), together with a new natural product 2-methoxyl-4-trans-pmpenyl-phenol α-L-rhamnopyranosyl-(1 → 6)-β-D-glucopy...A new ionone glycoside (6R,9R)-blumenyl α-L-rhamnopyranosyl-(1 → 6)-β-D-gluco-pyranoside (1), together with a new natural product 2-methoxyl-4-trans-pmpenyl-phenol α-L-rhamnopyranosyl-(1 → 6)-β-D-glucopyranoside (2), was isolated from the leaves ofNeoalsomitra integrifoliola. Their structures were elucidated by chemical and spectral analysis. Compound 1 showed weak anti-inflammatory and low-level antioxidant activities.展开更多
Two new acetylated flavonoid diglycosides, scutellarein-5-O-[α-L-rhamnopyranosyl-(1 → 4)-β-D-6-O-acetylglucopyranoside](1), apigenin-5-O-[α-L-rhamnopyranosyl-(1→ 2)-β-D-3,6-di-O-acetylglucopyranoside] (2...Two new acetylated flavonoid diglycosides, scutellarein-5-O-[α-L-rhamnopyranosyl-(1 → 4)-β-D-6-O-acetylglucopyranoside](1), apigenin-5-O-[α-L-rhamnopyranosyl-(1→ 2)-β-D-3,6-di-O-acetylglucopyranoside] (2), were isolated from the leaves of Cephalotaxus sinensis. Their structures were determined by chemical and spectroscopic methods including HR-FAB-MS,^1H-^1H COSY, HSQC and HMBC experiments.展开更多
目的研究海南含羞草(M im osa pudica)的化学成分。方法利用D iaion HP-20,Toyopearl HW-40,MC I-Gel CHP-20,Sephadex LH-20,RP18及硅胶等柱色谱法对海南含羞草成分进行分离纯化,根据理化性质和光谱数据鉴定化合物的结构。结果分离鉴定...目的研究海南含羞草(M im osa pudica)的化学成分。方法利用D iaion HP-20,Toyopearl HW-40,MC I-Gel CHP-20,Sephadex LH-20,RP18及硅胶等柱色谱法对海南含羞草成分进行分离纯化,根据理化性质和光谱数据鉴定化合物的结构。结果分离鉴定了4个化合物:7,8,3,′4′-四羟基-6-C-[α-L-鼠李糖-(1→2)]-β-D-葡糖黄酮碳苷(I),5,7,4′-三羟基-8-C-[α-L-鼠李糖(1→2)]-β-D-葡糖黄酮碳苷(II),5,7,3,′4′-四羟基-6-C-[α-L-鼠李糖-(1→2)]-β-D-葡糖黄酮碳苷(III),儿茶素(IV)。结论化合物I为新化合物,化合物II^IV为首次从该植物中分离得到。展开更多
A new triterpene and a saponin, named 2α,3β23-trihydroxyurs-20-en-28-oic acid (1) and 2α,3β,23-trihydroxyurs-20-en-28-oic acid O-α-L-rhanmopyranosyl-(1→4)-O-β-D-glucopyranosyl-(1→6)-O-β-D-glucopyranosyl...A new triterpene and a saponin, named 2α,3β23-trihydroxyurs-20-en-28-oic acid (1) and 2α,3β,23-trihydroxyurs-20-en-28-oic acid O-α-L-rhanmopyranosyl-(1→4)-O-β-D-glucopyranosyl-(1→6)-O-β-D-glucopyranosyl ester (2), have been isolated from the aerial part of CenteUa asiatica. Their structures were elucidated by spectral methods, including 2D-NMR spectra.展开更多
文摘首次采用反相高效液相色谱法测定茜草根中1,3,6-trihydroxy-2-methylanthraquinone-3-O-[3-O-acetyl-α-L-rhamnopyranosyl-(1→2)-β-D-glucopyranoside]的含量。色谱柱为Purospher star RP C18色谱柱(250mm×4.6mm,5μm),流动相为甲醇:水:四氢呋喃(65:34.7:0.3),流速为1.0mL/min,检测波长为276nm,柱温为25℃。该方法的线性范围为0.020~0.160μg,r=0.9998,平均回收率为101.5%,RSD为2.0%(n=6)。该方法测定1,3,6-trihydroxy-2-methylanthraquinone-3-O-[3-O-acetyl-α-L-rhamnopyranosyl-(1→2)-β-D-glucopyranoside]含量灵敏、准确、重现性好。
基金partially supported by the Department of Biotechnology,New Delhi,India(Grant no.BT/PR11505/SPD/24/337/2008BT/PR9128/INF/22/190/2013)
文摘Delonix elata L.is a Ceasalpinaceae species and is traditionally used in India for treatment of skin diseases,liver diseases and rheumatic problems.However,systematic evaluation of its wound healing activity is lacking.Thus,in the present study,we aimed to assess the wound healing activity of D.elata stem bark extract(DSE) and its isolated constituent quercetin-3-rhamnopyranosyl-(1-6) glucopyranoside(QRPG) in rats.The formulations effects on wound healing were assessed by the wound contraction rate,epithelialization period,tensile strength,content of the hydroxyproline,hexosamine and uronic acid in granulation tissue,histopathological studies and Col 1 α(I) expression level in wound tissue by reverse transcription polymerase chain reaction(RT-PCR) study.The topical application of DSE ointment caused faster epithelialization,significant wound contraction(100%),and better tensile strength(710.5 ± 10.5 g/cm^2),while QRPG showed wound epithelialization with 98.2%contraction,better than that of the control group(78.18%).The biochemical analysis of granulation tissue revealed that DSE and QRPG significantly increased hydroxyproline,hexosamine and uronic acid content.A significant increase in the expression of Col 1 α(I) was observed in the wound tissue of DSE and QRPG treated rats.DSE and QRPG were shown to enhance wound healing by increasing collagen synthesis through upregulation of Col 1 α(I),thus validating ethnomedicinal uses.
基金Project supported by the State Science and Technology Committee of China.
文摘Propyl O-(α-L-rhamncpyranosyl)-(1→3)-[2,4-di-O-(2s-methylbutyryl)-α-L-rham-nopyranosyl]-(1→2)-(3-O-acetyl-β-D-glucopyranosyl)-(1→2)-β-D-fucopyranoside (1), the tetrasac-charide moiety of Tricolorin A, was synthesized in total 23 steps with a longest linear sequence of 10 steps, and overall yield of 3.7% from D-Glucose. The isomerization of the dioxolane-type berzyli-dene in the presence of NIS/AgOTf was observed. Tetrasaccharide 1 exhibited no activity against the cultured P388 cell as Tricolorin A did.
基金the National science fund for Distinguished Young Scholars (No.30625040)the Key Project of Natural Science Foundation of China (No.20432030)+1 种基金"973"Project (No.2004CB518906)PCSIRT (No.IRT0514).
文摘A new ionone glycoside (6R,9R)-blumenyl α-L-rhamnopyranosyl-(1 → 6)-β-D-gluco-pyranoside (1), together with a new natural product 2-methoxyl-4-trans-pmpenyl-phenol α-L-rhamnopyranosyl-(1 → 6)-β-D-glucopyranoside (2), was isolated from the leaves ofNeoalsomitra integrifoliola. Their structures were elucidated by chemical and spectral analysis. Compound 1 showed weak anti-inflammatory and low-level antioxidant activities.
文摘Two new acetylated flavonoid diglycosides, scutellarein-5-O-[α-L-rhamnopyranosyl-(1 → 4)-β-D-6-O-acetylglucopyranoside](1), apigenin-5-O-[α-L-rhamnopyranosyl-(1→ 2)-β-D-3,6-di-O-acetylglucopyranoside] (2), were isolated from the leaves of Cephalotaxus sinensis. Their structures were determined by chemical and spectroscopic methods including HR-FAB-MS,^1H-^1H COSY, HSQC and HMBC experiments.
文摘目的研究海南含羞草(M im osa pudica)的化学成分。方法利用D iaion HP-20,Toyopearl HW-40,MC I-Gel CHP-20,Sephadex LH-20,RP18及硅胶等柱色谱法对海南含羞草成分进行分离纯化,根据理化性质和光谱数据鉴定化合物的结构。结果分离鉴定了4个化合物:7,8,3,′4′-四羟基-6-C-[α-L-鼠李糖-(1→2)]-β-D-葡糖黄酮碳苷(I),5,7,4′-三羟基-8-C-[α-L-鼠李糖(1→2)]-β-D-葡糖黄酮碳苷(II),5,7,3,′4′-四羟基-6-C-[α-L-鼠李糖-(1→2)]-β-D-葡糖黄酮碳苷(III),儿茶素(IV)。结论化合物I为新化合物,化合物II^IV为首次从该植物中分离得到。
文摘A new triterpene and a saponin, named 2α,3β23-trihydroxyurs-20-en-28-oic acid (1) and 2α,3β,23-trihydroxyurs-20-en-28-oic acid O-α-L-rhanmopyranosyl-(1→4)-O-β-D-glucopyranosyl-(1→6)-O-β-D-glucopyranosyl ester (2), have been isolated from the aerial part of CenteUa asiatica. Their structures were elucidated by spectral methods, including 2D-NMR spectra.
基金This work was supported in part by the National Science Fund for Distinguished Young Scholars to Y.-M.Shen(30325044),the National Natural Science Foundation of China(30070007,30430020),Chi-nese Academy of Sciences(KSCX2-SW-313)and Natural Science Founda-tion of Yunnan Province(99B0017G)