Euphorbia lathyris （Caper spurge） is a toxic and potent Chinese materia medica （T/PCMM）. This study sought a method for identifying five diterpenoids （Euphorbia factors LI-L3, L7a, and Ls） with the spectra of UV...Euphorbia lathyris （Caper spurge） is a toxic and potent Chinese materia medica （T/PCMM）. This study sought a method for identifying five diterpenoids （Euphorbia factors LI-L3, L7a, and Ls） with the spectra of UV and mass, quantifying three diterpenoids L1, L2, and L8 in crude extracts of unprocessed and processed E. lathyris seeds by liquid chromatography/ electrospray ionization mass spectrometry （LC-ESI-MS）. The analysis was achieved on an Agilent Eclipse XDB-C18 column （4.6 mm× 150mm i.d., 5 μm） with an isocratic elution with a mobile phase consisting of water and acetonitrile at a flow rate of 0.25 mL/min at column temperature of 30 ℃ and UV detection was set at 272 nm. An ESI source was used with a positive ionization mode. The calibration curve was linear in the ranges of 9.9-79 μg/mL for Euphorbia factor Lb 3.8-30.5μg/mL for Euphorbia factor L2, and 1.0-20.6 μg/mL for Euphorbia factor LB. The average recoveries （n=6） of three diterpenoids were 98.39%, 91.10% and 96.94%, respectively, with RSD of 2.5%, 2.4% and 2.1%, respectively. The contents of the three diterpenoids in processed E. lathyris seeds were 3.435, 1.367 and 0.286 mg/g, respectively, which decreased more sharply than those in unprocessed E. lathyris seeds which were 4.915, 1.944 and 0.425 mg/g, respectively. The method is simple, accurate, reliable and reproducible, and it can be applied to control the quality of unprocessed and processed E. lathyris seeds.展开更多
Dragon＇s blood is a traditional medicine and used in many countries with different cultures because of its various therapeutic properties. The main bioactive constituents of dragon＇s blood are flavonoids, which exhi...Dragon＇s blood is a traditional medicine and used in many countries with different cultures because of its various therapeutic properties. The main bioactive constituents of dragon＇s blood are flavonoids, which exhibit various pharmaceutical activities, such as haemostatic, analgesic, anticoagulant, and antimicrobial activities and so on, and have attracted the attention of researchers on the development of new drugs. However, the formation process of dragon＇s blood in nature is very slow, which cannot meet the demand of pharmaceutical uses. Dracaena cambodiana （D. cambodiana） is one of the resource plants of dragon＇s blood na, 6-benzylaminopurine was added in the medium, then red During the course of tissue culture of D. cambodiasecretion was discovered in the cultured medium. Twelve compounds（1--12）, including 11 flavonoids, were determined via the analysis of constituents of the cultured medium by high performance liquid chromatography-electrospray ionization-mass spectrometry（HPLC-ESI-MS） and the results were compared with that of the standards isolated from dragon＇s blood. Among compounds 1-12, 4,4＇- dihydroxy-2-methoxydihydrochalcone（5）, 4,4＇-dihydroxy-2,6-dimethoxydihydrochalcone（6） and （2S）-7,3＇-dihydroxy- 4＇-methoxyflavane（9） were major compounds of the red secretion, with contents of 15.70, 7.10 and 57.23 mg/L, respectively. Therefore, it is promising that flavonoids from dragon＇s blood can be obtained from the tissue culture of its resource plants for the purpose of drug development.展开更多
A high performance liquid chromatography coupled with electrospray ionization-tandem mass spectrome try（HPLC-ESI-MS/MS） method was developed for the analysis and identification of ginsenosides in the extracts of raw...A high performance liquid chromatography coupled with electrospray ionization-tandem mass spectrome try（HPLC-ESI-MS/MS） method was developed for the analysis and identification of ginsenosides in the extracts of raw Panax ginseng（RPG） and steamed Panax ginseng at high temperatures（SPGHT）. A total of 25 ginsenosides were extracted include of which 10 low-polar ginsenosides, such as ginsenosides F4, Rk3, Rh4, 20S-Rg3, 20R-Rg3 and so on, were identified according to their HPLC retention time and MS/MS data. The results indicated that the low polar ginsenosides were seldom found in RPG. For the exploration of the transformation pattern of the ginsenosides in steam processing, the standards of ginsenosides Re, Rg1, Rb1, Rc, Rb2, Rb3 and Rd were selected and hydrolyzed at a temperature of 120 oC. The results show that these polar ginsenosides can be converted to low-polar ginsenosides such as Rg2, Rg6, F4, Rk3 and Rg5 by hydrolyzing the sugar chains.展开更多
依次以MCI gel CPH 20P(75~150μm)树脂和Sephadex^(TM) LH-20葡聚糖凝胶为层析柱填料,对‘紫娟’茶花色苷进行分离纯化,采用5%乙酸-甲醇溶液和5%乙酸溶液对花色苷提取液梯度洗脱,得到6种花色苷组分。采用薄层层析、高效液相色谱及高效...依次以MCI gel CPH 20P(75~150μm)树脂和Sephadex^(TM) LH-20葡聚糖凝胶为层析柱填料,对‘紫娟’茶花色苷进行分离纯化,采用5%乙酸-甲醇溶液和5%乙酸溶液对花色苷提取液梯度洗脱,得到6种花色苷组分。采用薄层层析、高效液相色谱及高效液相色谱-电喷雾-串联质谱对‘紫娟’茶花色苷组成成分进行研究。结果表明:从‘紫娟’茶鲜叶中分离出的花色苷为飞燕草素-3-O-半乳糖苷、矢车菊素-3-O-半乳糖苷、飞燕草素-3-O-(6-(Z)对香豆酸)吡喃半乳糖苷、矢车菊素-3-O-(6-(Z)对香豆酸)吡喃半乳糖苷、飞燕草素-3-O-(6-(E)对香豆酸)吡喃半乳糖苷、矢车菊素-3-O-(6-(E)对香豆酸)吡喃半乳糖苷。展开更多
基金supported by the Natural Science Foundation of Zhejiang Province,China (Y2080137)
文摘Euphorbia lathyris （Caper spurge） is a toxic and potent Chinese materia medica （T/PCMM）. This study sought a method for identifying five diterpenoids （Euphorbia factors LI-L3, L7a, and Ls） with the spectra of UV and mass, quantifying three diterpenoids L1, L2, and L8 in crude extracts of unprocessed and processed E. lathyris seeds by liquid chromatography/ electrospray ionization mass spectrometry （LC-ESI-MS）. The analysis was achieved on an Agilent Eclipse XDB-C18 column （4.6 mm× 150mm i.d., 5 μm） with an isocratic elution with a mobile phase consisting of water and acetonitrile at a flow rate of 0.25 mL/min at column temperature of 30 ℃ and UV detection was set at 272 nm. An ESI source was used with a positive ionization mode. The calibration curve was linear in the ranges of 9.9-79 μg/mL for Euphorbia factor Lb 3.8-30.5μg/mL for Euphorbia factor L2, and 1.0-20.6 μg/mL for Euphorbia factor LB. The average recoveries （n=6） of three diterpenoids were 98.39%, 91.10% and 96.94%, respectively, with RSD of 2.5%, 2.4% and 2.1%, respectively. The contents of the three diterpenoids in processed E. lathyris seeds were 3.435, 1.367 and 0.286 mg/g, respectively, which decreased more sharply than those in unprocessed E. lathyris seeds which were 4.915, 1.944 and 0.425 mg/g, respectively. The method is simple, accurate, reliable and reproducible, and it can be applied to control the quality of unprocessed and processed E. lathyris seeds.
基金Supported by the National Natural Science Foundation of China（No.31070321）, the National Support Science and Technology Subject of China（No.2013BAI11B04）, the Fundamental Research Funds for Central Public Welfare Research Institutes, Chinese Academy of Tropical Agricultural Sciences（No.1630052012014） and the Major Technology Project of Hainan Province, China（No. ZDZX2013008-4）.
文摘Dragon＇s blood is a traditional medicine and used in many countries with different cultures because of its various therapeutic properties. The main bioactive constituents of dragon＇s blood are flavonoids, which exhibit various pharmaceutical activities, such as haemostatic, analgesic, anticoagulant, and antimicrobial activities and so on, and have attracted the attention of researchers on the development of new drugs. However, the formation process of dragon＇s blood in nature is very slow, which cannot meet the demand of pharmaceutical uses. Dracaena cambodiana （D. cambodiana） is one of the resource plants of dragon＇s blood na, 6-benzylaminopurine was added in the medium, then red During the course of tissue culture of D. cambodiasecretion was discovered in the cultured medium. Twelve compounds（1--12）, including 11 flavonoids, were determined via the analysis of constituents of the cultured medium by high performance liquid chromatography-electrospray ionization-mass spectrometry（HPLC-ESI-MS） and the results were compared with that of the standards isolated from dragon＇s blood. Among compounds 1-12, 4,4＇- dihydroxy-2-methoxydihydrochalcone（5）, 4,4＇-dihydroxy-2,6-dimethoxydihydrochalcone（6） and （2S）-7,3＇-dihydroxy- 4＇-methoxyflavane（9） were major compounds of the red secretion, with contents of 15.70, 7.10 and 57.23 mg/L, respectively. Therefore, it is promising that flavonoids from dragon＇s blood can be obtained from the tissue culture of its resource plants for the purpose of drug development.
基金Supported by the Key Project of Jilin Provincial Science and Technology Department, China(No.20090908)the Project of Changchun Science and Technology Bureau, China(No.2008256)the Special Cooperative Project for Hitech Industrializa-tion of Jilin Provincial Science and Chinese Academy of Sciences, China(No.2009SYHZ0026)
文摘A high performance liquid chromatography coupled with electrospray ionization-tandem mass spectrome try（HPLC-ESI-MS/MS） method was developed for the analysis and identification of ginsenosides in the extracts of raw Panax ginseng（RPG） and steamed Panax ginseng at high temperatures（SPGHT）. A total of 25 ginsenosides were extracted include of which 10 low-polar ginsenosides, such as ginsenosides F4, Rk3, Rh4, 20S-Rg3, 20R-Rg3 and so on, were identified according to their HPLC retention time and MS/MS data. The results indicated that the low polar ginsenosides were seldom found in RPG. For the exploration of the transformation pattern of the ginsenosides in steam processing, the standards of ginsenosides Re, Rg1, Rb1, Rc, Rb2, Rb3 and Rd were selected and hydrolyzed at a temperature of 120 oC. The results show that these polar ginsenosides can be converted to low-polar ginsenosides such as Rg2, Rg6, F4, Rk3 and Rg5 by hydrolyzing the sugar chains.
文摘依次以MCI gel CPH 20P(75~150μm)树脂和Sephadex^(TM) LH-20葡聚糖凝胶为层析柱填料,对‘紫娟’茶花色苷进行分离纯化,采用5%乙酸-甲醇溶液和5%乙酸溶液对花色苷提取液梯度洗脱,得到6种花色苷组分。采用薄层层析、高效液相色谱及高效液相色谱-电喷雾-串联质谱对‘紫娟’茶花色苷组成成分进行研究。结果表明:从‘紫娟’茶鲜叶中分离出的花色苷为飞燕草素-3-O-半乳糖苷、矢车菊素-3-O-半乳糖苷、飞燕草素-3-O-(6-(Z)对香豆酸)吡喃半乳糖苷、矢车菊素-3-O-(6-(Z)对香豆酸)吡喃半乳糖苷、飞燕草素-3-O-(6-(E)对香豆酸)吡喃半乳糖苷、矢车菊素-3-O-(6-(E)对香豆酸)吡喃半乳糖苷。
