排序方式: 共有19条查询结果,搜索用时 15 毫秒
1.
目的 对海风藤Piperis kadsurae藤茎的化学成分进行研究,并对分离的化合物进行初步的神经保护活性筛选。方法 运用硅胶、ODS、和Sephadex LH-20等柱色谱以及反相制备型HPLC等各种现代色谱分离技术进行系统的分离纯化,利用波谱学方法确定化合物结构。同时采用MTT和RTCA法,以白藜芦醇作为阳性对照,对化合物进行体外神经保护活性实验。结果 从海风藤藤茎的二氯甲烷和醋酸乙酯提取物中分离得到22个化合物,分别鉴定为puberulin(1)、(-)-acuminatin(2)、dihydrocarinatin(3)、海风藤酮(4)、山蒟素C(5)、3-羟基苯甲酸苄酯(6)、2-羟基苯甲酸苄酯(7)、cherrevenol D(8)、trans-2,3-diacetoxy-1-[(benzoy1oxy)methyl]-cyclohexa-4,6-diene (9)、(3R,4R)-4-O-acetyl-5-(benzoyloxymethyl)cyclohexa-1,5-diene-3,4-diol(10)、(-)-sootepoxidechlorohydrinA(11)、香... 相似文献
2.
目的研究桑椹Mori Fructus醇提物的化学成分。方法采用硅胶、Sephadex LH-20和ODS柱色谱法及半制备型高效液相色谱进行分离纯化,通过其理化性质和波谱数据对化合物结构进行鉴定。结果从桑椹醇提物中分离得到12个化合物,分别鉴定为桑脂素苷(1)、(7R,8S)-4,7,9,9′-tetrahydroxy-3,3′-dimethoxy-8-O-4′-neolignan-9′-O-β-D-glucopyranoside(2)、2-苯乙基-β-D-吡喃葡萄糖苷(3)、1′-O-苯乙基-β-D-呋喃芹菜糖基-(1→2)-β-D-吡喃葡萄糖苷(4)、苯甲醇-O-β-D-吡喃葡萄糖苷(5)、过氧麦角甾醇(6)、(24R)-6β-hydroxy-24-ethyl-cholest-4-en-3-one(7)、(22E)-5α,8α-epidioxy-24-methyl-cholesta-6,9(11),22-trien-3β-ol(8)、trans-(S)-(+)-脱落酸(9)、cis-(S)-(+)-脱落酸(10)、(S)-(+)-1-甲基-脱落-6-酸(11)、菜豆酸(12)。结论化合物1为未见文献报道的新化合物,化合物2、7~12为首次从该植物中分离得到。 相似文献
3.
Jiang Hu Xiao-Dong Shi Xia Mao Hui Li Jian-Gang Chen 《Journal of Asian natural products research》2013,15(7):703-708
Phytochemical investigation of the 70% ethanol extract from Viburnum ternatum resulted in the isolation of three new compounds, vibsanol-9′-al (1), 4-methoxy-vibsanol (2), and 5,7-dihydroxy-4′-methoxyflavanone(8 → 3′)-5,7-dihydroxy-4′-methoxyflavone (4), together with a known compound vibsanol (3). Their structures were determined on the basis of spectroscopic analyses, including 1D and 2D NMR (COSY, HMQC, HMBC, and NOESY) and HR-ESI-MS analyses. 相似文献
4.
Ui Joung Youn Nighat Fatima Quan Cheng Chen Sungwook Chae Tran Manh Hung Byung‐Sun Min 《Phytotherapy research : PTR》2013,27(9):1419-1422
Two neolignans, 4′‐methoxymagndialdehyde (1) and magnaldehyde B (2), were isolated from the stem bark of Magnolia officinalis (Magnoliaceae), evaluated for apoptosis‐inducing effects in human cervical epitheloid carcinoma HeLa cells. The apoptosis‐inducing activity of compounds 1 and 2 were assessed by DNA content using flow cytometric analysis. In the immunoblotting analysis, the treatment with 1 and 2 resulted in the cleavage of procaspase‐8 and ‐3 and poly(ADP‐ribose)polymerase into active forms. In addition, in vivo, the administration of 2 to Lewis lung carcinoma‐inoculated mice evidenced a significant inhibition of tumor growth (volume) with reduction of 28.7% at concentration of 20 mg/kg, as compared with the control mice. These findings suggest that 2 can inhibit the proliferation of tumor cells, and might be an anti‐tumoric agent. Copyright © 2012 John Wiley & Sons, Ltd. 相似文献
5.
党参的化学成分研究 总被引:1,自引:0,他引:1
综合运用各种色谱分离技术对党参的水提取物进行化学成分研究,利用各种波谱技术确定化合物的结构。该研究从党参中分离得到8个单体成分,分别鉴定为:(-)-(7R,8S,7'E)-3',4-dihydroxy-3-methoxy-8,4'-oxyneoligna-7'-ene-7,9,9'-triol(1)、9-(tetrahydropyran-2-yl)-nona-trans,trans-2,8-diene-4,6-diyn-1-ol(2)、9-(tetrahydropyran-2-yl)-trans-non-8-ene-4,6-diyn-1-ol(3)、党参炔苷元(4)、党参炔苷(5)、去氢双松柏醇(6)、5-羟甲基-糠醛(7)、4,4'-dihydroxy-3,3'-dimethoxy-trans-stilbene(8)。其中,化合物1为新的木脂素类化合物,2,3为首次从党参属中分离得到。 相似文献
6.
7.
8.
Barlericin, the new neolignan diglycoside, has been isolated from the n-butanol soluble sub-fraction of Barleria acanthoides along with dehydrodiconiferyl alcohol 12-O-β-d-glucopyranoside (2), reported for the first time from the genus Barleria. Their structures have been assigned on the basis of spectral studies. 相似文献
9.
10.
望春花中的木脂素类化学成分研究 总被引:1,自引:2,他引:1
目的 研究望春花Magnolia biondii花蕾的木脂素类化学成分,为制定辛夷的质量标准寻找标准物庾,也为了进一步了解其有效成分。方法 硅胶柱色谱分离,波谱分析(UV、IR、MS、3H-NMR、13C-NMR)鉴定结构。结果 分离并鉴定了4个木脂素(Ⅰ~Ⅳ)和1个新木脂素(Ⅴ)类化合物:veraguensin(Ⅰ)、松脂素二甲醚(pinoresinol dimethyl ether,Ⅰ)、木兰脂素(magnolin,in)、里立脂素B二甲醚(1irioresinol—B dimethyl ether,Ⅳ)和denudatone(Ⅴ)。结论 化合物Ⅰ和Ⅴ系首次从该植物中分离得到。 相似文献