共查询到20条相似文献,搜索用时 781 毫秒
1.
Liu YH Huang SX Zhao QS Ding JK Goh NK Sun HD Chia TF Tan SN Chia LS 《Natural product research》2008,22(10):860-864
A new ent-kaurane diterpenoid, lophanthodin G (1) and one known abietanoid, 6alpha-hydroxyferruginol (2), were isolated from the leaves of Isodon lophanthoides var. geradianus. The structure of the new compound 1 was established using spectroscopic methods including extensive 1D and 2D NMR analysis. 相似文献
2.
Five new ent-kaurane diterpenoids xindongnins H-L (1-5), together with five known ones, xindongnins A and B (6, 7), melissoidesins G (8), dawoensin A (9), and glabcensin V (10) were isolated from Isodon rubescens var. rubescens. Their structures were elucidated by spectroscopic methods including extensive 2D NMR techniques. 相似文献
3.
Salimuzzaman Siddiqui S.Imtiaz Haider S.Salman Ahmad B.S. Siddiqui 《Tetrahedron》1985,41(20):4577-4580
A new dihydroindole alkaloid sandwicolidine has been isolated from Rauwolfia serpentina and its structure elucidated through chemical and spectroscopic studies. 相似文献
4.
Yang LB Li L Huang SX Pu JX Zhao Y Ma YB Chen JJ Leng CH Tao ZM Sun HD 《Chemical & pharmaceutical bulletin》2011,59(9):1102-1105
Four new diterpenoides, isolophanthins A-D (1-4) together with seven known abietane diterpenoides (5-11), have been isolated from Isodon lophanthoides var. gerardianus. The new diterpenoides were elucidated by spectroscopic analysis. Some of them showed significant activities against HBsAg and HBeAg of hepatitis B virus in Hep G 2.2.15 cells, as well as the human tumor cell lines, HL-60, A-549, MOLT-4, and BEL-7402. 相似文献
5.
Two new alkaloids (1, 2) were isolated from the whole plants of Crinum asiaticum var. sinicum together with seven known alkaloids. The structures of the new alkaloids were elucidated by spectroscopic analyses and chemical conversions from known alkaloids. New alkaloid 1 was isolated for the first time as a natural product, although it has been prepared as a synthetic product. 相似文献
6.
Ming-Der Wu Ming-Jen Cheng Jih-Jung Chen Nanthaphong Khamthong Wen-Wei Lin Yueh-Hsiung Kuo 《Molecules (Basel, Switzerland)》2022,27(2)
Seven new compounds, including one dimer novel skeleton, chamaecyformosanin A (1); three diterpenes, chamaecyformosanins B–D (2–4); one sesquiterpene, chamaecyformosanin E (5); and two monoterpenes, chamaecyformosanins F and G (6 and 7) were isolated from the methanol extract of the bark of Chamaecyparis obtusa var. formosana. Their structures were established by the mean of spectroscopic analysis and the comparison of NMR data with those of known analogues. Their structures were elucidated on the basis of physicochemical evidence, in-depth NMR spectroscopic analysis, and high-resolution mass spectrometry. Furthermore, the isolated compounds were subjected to an evaluation of their antimicrobial activity. Metabolites 1, 3, and 4 present antibacterial activities. It is worth mentioning that the chemical composition of the bark of C. obtusa var. formosana has never been studied in the past. This is the first time the barks from C. obtusa var. formosana were studied and two new skeleton compounds, 1 and 7, were obtained. 相似文献
7.
Shinichi Uesato Yoshio Takeda Toshihiro Hashimoto Kenichi Uobe Hiroyuki Inouye Heihachiro Taguchi Toru Endo 《Helvetica chimica acta》1984,67(8):2111-2127
From Hydrangea macrophylla var. Macrophylla, four new secoiridoid glucosides, hydrangenosies A, B, C and D, were isolated, along with the known iridoid glucosides loganin, secologanin, secologanic acid and sweroside. Moreover, hydrangenosides E, F, and G, the glucosides of the same class, were isolated together with hydrangenosides C and D from Hydrangea Scandens. Based on spectroscopic and chemical methods, the novel structures of the new glucosides consisting of secologanin and a shikimate-malonate-derived unit which are joined by a C? C bond were elucidated. However, seven other Hydrangea plants were tested and found not to contain hydrangenoside-type glucosides. 相似文献
8.
Hsieh PW Chang FR Wu CC Li CM Wu KY Chen SL Yen HF Wu YC 《Chemical & pharmaceutical bulletin》2005,53(3):336-338
A new cyclic peptide, longicalycinin A (1), and six known compounds, vaccaroside A, dianoside A, dianoside G, 3-(4-hydroxy-3-methoxy-phenyl)propionic acid methyl ester, p-hydroxybenzoic acid, and p-hydroxybenzaldehyde were isolated from the MeOH extract of Dianthus superbus var. longicalycinus. The amino acid sequences of 1 was elucidated as cyclo(Gly(1)-Phe(2)-Tyr(3)-Pro(4)-Phe(5)-) on the basis of ESI tandem mass fragmentation analysis, chemical evidence, and extensive 2D NMR methods. Furthermore, compound 1 showed cytotoxicity to Hep G2 cancer cell line. 相似文献
9.
Madhusudanan KP Banerjee S Khanuja SP Chattopadhyay SK 《Biomedical chromatography : BMC》2008,22(6):596-600
The applicability of a new mass spectrometric technique, DART (direct analysis in real time) has been studied in the analysis of the hairy root culture of Rauvolfia serpentina. The intact hairy roots were analyzed by holding them in the gap between the DART source and the mass spectrometer for measurements. Two nitrogen-containing compounds, vomilenine and reserpine, were characterized from the analysis of the hairy roots almost instantaneously. The confirmation of the structures of the identified compounds was made through their accurate molecular formula determinations. This is the first report of the application of DART technique for the characterization of compounds that are expressed in the hairy root cultures of Rauvolfia serpentina. Moreover, this also constitutes the first report of expression of reserpine in the hairy root culture of Rauvolfia serpentina. 相似文献
10.
Five new spirobifuranocoumarins, dahuribirins A-E (1-5) and two new bifuranocoumarins, dahuribirins F and G (6 and 7) were isolated from Japanese Bai Zhi (the root of Angelica dahurica Benth. et Hook. var. dahurica Benth. et Hook.) and their structures were established by chemical and spectral means. 相似文献
11.
The diethyl ether extract of the Japanese liverwort Metacalypogeia cordifolia yielded five new chroman type derivatives in addition to known sesquiterpenoids. One of the new chroman derivatives was also isolated from the ether extract of another liverwort, Cephalozia otaruensis. Their structures were established by extensive two dimensional (2D) NMR techniques and chemical evidence. They were shown to be 2,2-dimethyl-7-(3-methyl-2-butenyl)-chroman derivatives. This was the first example of the isolation of the chroman-type compounds, although various types of aromatic compounds have been isolated from liverworts. 相似文献
12.
Ono M Takara Y Egami M Uranaka K Yoshimitsu H Matsushita S Fujiwara Y Ikeda T Nohara T 《Chemical & pharmaceutical bulletin》2006,54(2):237-239
Two new steroidal alkaloid glycosides, esculeosides C and D, have been isolated from the ripe fruit of Cherry tomato [Lycopersicon esculentum var. cerasiforme (DUNAL) ALEF.], along with three known steroidal alkaloid glycosides, esculeoside A, esculeoiside B, and lycoperoside G. Their chemical structures were determined on the basis of spectroscopic data. 相似文献
13.
Yun‐Chuan Xiao Jun Lei Miao Liu Min Yu Jian Ran Jing Xie Wei Li Jing Huang 《Helvetica chimica acta》2012,95(2):327-332
Three new bisabolocurcumin ethers, named demethoxybisabolocurcumin ether ( 1 ), bisabolocurcumin ether ( 2 ), and didemethoxybisabolocurcumin ether ( 3 ), along with two known compounds, 4 and 5 , were isolated from the AcOEt extract of the rhizomes of Curcuma longa L. Their structures were established by the analysis of NMR and MS data. The new compounds 1 – 3 , which possess a new 1,7‐diarylheptanoid skeleton linked with a bisabolone‐type sesquiterpene substructure by a C? O bond, were found for the first time in a natural source. 相似文献
14.
M Yoshikawa E Uchida N Chatani H Kobayashi Y Naitoh Y Okuno H Matsuda J Yamahara N Murakami 《Chemical & pharmaceutical bulletin》1992,40(12):3352-3354
New antiallergic and antimicrobial dihydroisocoumarins, thunberginols C, D, and E, were isolated from Hydrangeae Dulcis Folium, the fermented and dried leaves of Hydrangea macrophylla SERINGE var. thunbergii MAKINO, together with new dihydroisocoumarin glycosides, thunberginol G 3'-O-glucoside and (-)-hydrangenol 4'-O-glucoside. Their chemical structures have been determined on the basis of chemical and physicochemical evidence. Thunberginols C, D, E, G, and (-)-hydrangenol 4'-O-glucoside showed antiallergic activity in the in vitro bioassay using the Schults-Dale reaction in sensitized guinea pig bronchial muscle, and they also exhibited antimicrobial activity against oral bacteria. 相似文献
15.
A novel phenylpropanoid glycosides and a new derivation of phenolic glycoside from Paris Polyphylla var. yunnanensis 总被引:1,自引:0,他引:1
Yu Wang Wen Yuan Gao Tie Jun Zhang Yuan Qiang Guo 《中国化学快报》2007,18(5):548-550
A novel phenylpropanoid glycosides 1, named parispolyside F, and a novel derivation of phenolic glycoside 2, named parispolyside G, as well as two known flavonoid glycosides were isolated from the rhizome of Paris polyphylla var. yunnanensis. Their structures were elucidated by spectroscopic methods. 相似文献
16.
Nine new phragmalin-type limonoid orthoesters, tabulalides F-N (1-9), together with three known compounds, tabulalides C and D, and tabularisin N (10-12), were isolated from the stem bark of Chukrasia tabularis var. velutina. Extensive spectroscopic technologies were applied to elucidate the structures of these new compounds, including the application of circular dichroism (CD) exciton chirality method for the determination of the absolute configurations of 1 and 2. Tabulalide F (1) has a rare orthoisobutylate moiety in phragmalin-type limonoid orthoesters. These compounds were evaluated for cytotoxic activity against five human cancer cell lines in vitro. Tabulalide G (2) exhibits moderate cytotoxic activity against MCF-7 with IC(50) value of 20.4 μmol/l, and other compounds have weak inhibitory effects on the growth of tested tumor cells. 相似文献
17.
Oh OJ Chang SY Yook CS Yang KS Park SY Nohara T 《Chemical & pharmaceutical bulletin》2000,48(6):879-881
Two 3,4-seco-lupane triterpenoids (1, 2) were isolated from the leaves of Acanthopanax divaricatus var. albeofructus (Araliaceae). Based on the spectroscopic data, the chemical structures of 1 and 2 were characterized as 24-hydroxychiisanogenin and 22alpha-hydroxychiisanogenin, respectively. 1 was a new compound and 2 was isolated for the first time from the natural source, although it had been obtained as an enzymatically hydrolyzed artifact from 22alpha-hydroxychiisanoside. 相似文献
18.
Two new megastigmane glucosides, called excoecariosides A and B were isolated from the leaves of a medicinal Vietnamese plant, Excoecaria cochinchinensis LOUR. var. cochinchinensis (Euphorbiaceae) together with seven known compounds. Their structures were elucidated by spectroscopic analyses and chemical reactions including the modified Mosher's method. 相似文献
19.
Xue Mei NIU Sheng Hong LI Shuang Xi MEI Zhong Wen LIN Han Dong SUN* Laboratory of Phytochmistry Kunming Institute of Botany Academia Sinica Kunming 《中国化学快报》2001,(10)
Isodon eriocalyx var. laxiflora C. Y. Wu & H. W. Li, is a perennial herb naturally growing in the southern area of Yunnan province. In our continuing studies1 on its leaves collected from Xishuanbana prefecture, a new 6,7-seco-ent-kaurane diterpenoid, named laxiflorin E (1), together with two known 6,7-seco-ent-kaurane diterpenoids2, eriocalyxin A (2) and laxiflorin C (3), was isolated. Their structures were established by spectroscopic analysis. Compound 1, obtained as colorless rhombus… 相似文献
20.
Crataegus pinnatifida Bge.var.major N.E.Br. is widely distributed in the northeast part of China. It is used as a medicinal plant to improve digestion, remove retention of food, promote blood circulation and resolve blood stasis both in traditional and folk medicine 1. Preparations of Crataegus leaves improve the heart function, the coronary blood supply and arrhythmia2. Up to now, fifty flavonoids have been isolated from Crataegus3,4. In our previous paper, some new flavonoid glycosides we… 相似文献