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1.
Four new biphenyl derivatives, oblongifoliagarcinines A–D ( 1 – 4 ), were isolated on the chemical investigation of the stems and leaves of Garcinia oblongifolia. The structures of 1 – 4 were established on the basis of 1D‐ and 2D‐NMR and other spectroscopic analyses. 相似文献
2.
Juan Li Hang Chang Wenyu Zhao Huifang Pi Hanli Ruan Peng Zhang 《Helvetica chimica acta》2014,97(5):689-693
Two new amide alkaloids, vaginatunine A and B ( 1 and 2 , resp.), and a new C18‐diterpenoid alkaloid vaginatunine C ( 3 ), together with four known alkaloids, were isolated from the tubers of Aconitum vaginatum. Their structures were determined by means of spectroscopic analyses and comparison of the data with those reported previously. 相似文献
3.
Six new cembrane diterpenes, lobophytolides A–F ( 1 – 6 , resp.), along with six known related cembranoids, 7 – 12 , were isolated from the Hainan soft coral Lobophytum sp. Their structures, including their relative configuration, were elucidated by extensive analyses of the spectroscopic data and by comparison with related known compounds. 相似文献
4.
Ponnapalli Mangala Gowri Sri Vedavyasa Srirangaraja Radhakrishnan Bhattar Poreddy Guruva Reddy Yerraballi Rakesh Shaik Jeelani Basha Akella Venkata Subrahmanya Sarma Janaswamy Madhusudana Rao 《Helvetica chimica acta》2009,92(7):1419-1427
An extensive study of metabolites present in Excoecaria agallocha Linn . led to the isolation of three new ent‐labdane‐type diterpenoids, named agallochaexcoerins A–C ( 1 – 3 ), besides three known compounds. The skeleton present in compound 1 is rather unusual, containing of a seven‐membered lactone. The structures were elucidated on the basis of spectroscopic studies and comparison with known related compounds. The isolated compounds 1 – 6 were not active against Raw 264.7 (macrophage‐like), K 562 (leukemia), and COLO 205 (colon) human carcinoma cell lines. 相似文献
5.
Kun Jiang Jun‐Qi Bai Jun Chang Jun‐Jie Tan Shi‐Jin Qu Hong‐Feng Luo Chang‐Heng Tan Da‐Yuan Zhu 《Helvetica chimica acta》2014,97(1):64-69
Asprellols A–C ( 1 – 3 , resp.), three new 24‐nortriterpenoids, were isolated from the CHCl3‐soluble fraction of 95% EtOH extract of the roots of Ilex asprella, together with a known nortriterpenoid. The structures of the new compounds were elucidated as 2,6β,20β‐trihydroxy‐3‐oxo‐11α,12α‐epoxy‐24‐norursa‐1,4‐dien‐28,13β‐olide ( 1 ), 2,6β‐dihydroxy‐3‐oxo‐11α,12α‐epoxy‐24‐norursa‐1,4,20(30)‐trien‐28,13β‐olide ( 2 ), and 2,6β‐dihydroxy‐3‐oxo‐11α,12α‐epoxy‐24‐noroleana‐1,4‐dien‐28,13β‐olide ( 3 ) on the basis of spectroscopic analyses. 相似文献
6.
Three new phenolic compounds, irisdichototins D, E, and F ( 1 – 3 , resp.) were isolated from the stems of Iris dichotoma. The structures of the new compounds were elucidated by spectroscopic analyses, including 2D‐NMR techniques. 相似文献
7.
Three new limonoids, cipadesins G–I ( 1 – 3 ), together with four known ones, were isolated from the leaves of Cipadessa cinerascens. Their structures were elucidated on the basis of 1D‐ and 2D‐NMR data. 相似文献
8.
Wei‐Lie Xiao Ying‐Li Wu Shan‐Zhai Shang Fei He Xiao Luo Guang‐Yu Yang Jian‐Xin Pu Guo‐Qiang Chen Han‐Dong Sun 《Helvetica chimica acta》2010,93(10):1975-1982
Four new highly oxygenated nortriterpenoids, lancifodilactones O–R ( 1 – 4 ), together with six known ones, i.e., 5 – 10 , were isolated from the leaves and stems of Schisandra lancifolia. Their structures were elucidated by spectroscopic analyses, including 1D‐ and 2D‐NMR experiments and mass spectrometry. Compounds 1 – 3 were evaluated for their cytotoxicity against NB4, A549, SHSY5Y, PC‐3, and MCF‐7 cell lines. No compounds exhibited significant cytotoxicity, the IC50 values being above 50 μM . 相似文献
9.
Xing‐Ping Zheng Qiong‐Fang Cui Jing‐Feng Zhao Li‐Juan Yang Hong‐Bin Zhang Xiao‐Dong Yang Liang Li 《Helvetica chimica acta》2014,97(12):1638-1643
Three new phthalides, gnaphalides A–C ( 1 – 3 , resp.), together with three known phthalides, were isolated from the aerial part of Gnaphalium adnatum. The structures of the new compounds were elucidated as 6‐(1,1‐dimethylprop‐2‐en‐1‐yl)‐5,7‐dihydroxy‐2‐benzofuran‐1(3H)‐one ( 1 ), 5‐hydroxy‐7‐[(2‐hydroxy‐3‐methylbut‐3‐en‐1‐yl)oxy]‐2‐benzofuran‐1(3H)‐one ( 2 ), and 1,3‐dihydro‐7‐[(3‐methylbut‐2‐en‐1‐yl)oxy]‐1‐oxo‐2‐benzofuran‐5‐yl β‐D ‐glucopyranoside ( 3 ) on the basis of spectral analyses. The structure of 1 was also confirmed by X‐ray crystallographic analysis. The three known phthalides, identified as 5,7‐dihydroxyisobenzofuran‐1(3H)‐one ( 4 ), anaphatol ( 5 ), and 7‐O‐(β‐glucopyranosyl)‐5‐hydroxyisobenzofuran‐1(3H)‐one ( 6 ), were isolated from the genus Gnaphalium for the first time. 相似文献
10.
Xue Zhang Hong‐Wei Liu Hao Gao Hui‐Ying Han Nai‐Li Wang Hou‐Ming Wu Xin‐Sheng Yao Zhao Wang 《Helvetica chimica acta》2007,90(12):2386-2394
Nine new sesquiterpenes, i.e., dendronobilins A–I ( 1 – 9 ), with copacamphane‐type ( 1 ), picrotoxane‐type ( 2 – 6 ), muurolene‐type ( 7 ), alloaromadendrane‐type ( 8 ), and cyclocopacamphane‐type ( 9 ) skeletons, were isolated from the 60% EtOH extract of the stems of Dendrobium nobile. Their structures were established as (1R,2R,4S,5S,6S,8S,9R)‐2,8‐dihydroxycopacamphan‐15‐one ( 1 ), (2β,3β,4β,5β)‐2,4,11‐trihydroxypicrotoxano‐3(15)‐lactone ( 2 ), (2β,3β,5β,9α,11β)‐2,11‐epoxy‐9,11,13‐trihydroxypicrotoxano‐3(15)‐lactone ( 3 ), (2β,3β,5β,12R*)‐2,11,13‐trihydroxypicrotoxano‐3(15)‐lactone ( 4 ), (2β,3β,5β,12S*)‐2,11,13‐trihydroxypicrotoxano‐3(15)‐lactone ( 5 ), (2β,3β,5β,9α)‐9,10‐cyclo‐2,11,13‐trihydroxypicrotoxano‐3(15)‐lactone ( 6 ), (9β,10α)‐muurol‐4‐ene‐9,10,11‐triol ( 7 ), (10α)‐alloaromadendrane‐10,12,14‐triol ( 8 ), and (5β)‐cyclocopacamphane‐5,12,15‐triol ( 9 ) on the basis of spectroscopic analysis. The absolute configuration of compound 1 was tentatively assigned as (1R,2R,4S,5S,6S,8S,9R) according to its CD spectrum and the octant rule. Compounds 1 and 4 – 9 were inactive in our preliminary in vitro immunomodulatory bioassay. 相似文献
11.
Yu‐Zhi Zhou Huan Chen Li Qiao Xuan Lu Hui‐Ming Hua Yue‐Hu Pei 《Helvetica chimica acta》2008,91(7):1277-1285
Five new aromatic glycosides, 1 – 5 , named as carthamosides B4–B8, together with three known compounds, 4′‐(hydroxyphenacyl)‐β‐D ‐glucopyranoside ( 6 ), benzyl‐O‐α‐L ‐rhamnopyranosyl‐(1→6)‐β‐D ‐glucopyranoside ( 7 ), and 4‐(methoxybenzyl)‐O‐β‐D ‐glucopyranoside ( 8 ), have been isolated from the air‐dried flower of Carthamus tinctorius. Their structures were identified on the basis of chemical and spectroscopic methods. 相似文献
12.
Lin Tu Yu Zhao Zu‐Yin Yu Yu‐Wen Cong Gang Xu Li‐Yan Peng Peng‐Tao Zhang Xiao Cheng Qin‐Shi Zhao 《Helvetica chimica acta》2008,91(8):1578-1587
One new dammarane triterpenoid, cylindrictone A ( 1 ), as well as five new nor‐dammarane triterpenoids cylindrictone B–F ( 2 – 6 ) were isolated from the leaves of Viburnum cylindrium, together with three known compounds 3β‐hydroxy‐hexanordammaran‐20‐one ( 7 ), 3α‐hydroxyoctanordammar‐12‐en‐17‐one ( 8 ), and neoalsogenin B ( 9 ). Their structures were identified by extensive NMR‐spectroscopic (especially 2D‐NMR) and mass‐spectrometric experiments, and the structure of 3 was further confirmed by a single‐crystal X‐ray analysis. The compounds exhibited no activity against human promyelocytic leukemia HL60 cell. 相似文献
13.
Qiu‐Fen Hu Xue‐Sen Li Hai‐Tao Huang Huai‐Xue Mu Pen‐Fei Tu Gan‐Peng Li 《Helvetica chimica acta》2012,95(2):349-352
Three new benzofuranylpropanoids, lanceolunes A–C ( 1 – 3 ), were isolated from the roots of Codonopsis lanceolata. Their structures were determined by means of HR‐ESI‐MS, extensive 1D‐ and 2D‐NMR spectroscopic, and chemical evidence. 相似文献
14.
Three new pteridines, hirudinoidines A – C ( 1 – 3 , resp.), with novel structural features were isolated from Hirudo nipponica Whitman , and their structures were elucidated on the basis of extensive spectroscopic analyses and by comparison of their spectral data with those of related metabolites. The configuration of 1 was unequivocally confirmed by single‐crystal X‐ray diffraction (Fig. 2). 相似文献
15.
Yu Yang Hong‐Yu Hu Neng‐Jiang Yu Yang Zhang Yi‐Min Zhao 《Helvetica chimica acta》2010,93(8):1622-1627
Three new paeonidanin‐type monoterpene glycosides, named suffrupaeonidanins A–C, were isolated as minor components from the root cortex of Paeonia suffruticosa Andr. Their structures were elucidated by a combination of 1D‐ and 2D‐NMR, and mass spectral techniques. 相似文献
16.
Three new glycosides with the same saccharides, namely miliusoside A ( 1 ), miliusoside B ( 2 ), and miliusoside C ( 3 ), together with five known compounds were isolated from the stems of Miliusa balansae. Their structures were elucidated on the basis of detailed spectroscopic analysis and by comparison with the spectra of related model compounds. There was a rarely encountered α‐D ‐apiose moiety occurring in all new compounds. 相似文献
17.
A phytochemical investigation of the flowers of Rosa damascena resulted in the isolation of three new isoprenylated aurones, damaurones C–E ( 1 – 3 , resp.), together with six known compounds, 4 – 9 . The structures of the new compounds were elucidated by spectroscopic methods, including extensive 1D‐ and 2D‐NMR experiments. 相似文献
18.
Zaheer Ahmad Itrat Fatima Sajid Mehmood Rehana Ifzal Abdul Malik Nighat Afza 《Helvetica chimica acta》2008,91(1):73-78
Three new 20,24‐epoxydammarane triterpenes, santolins A–C ( 1 – 3 ), were isolated from the AcOEt‐soluble fraction of the MeOH extract of Salvia santolinifolia (whole plant). Their structures were assigned based on 1H‐NMR, 13C‐NMR (DEPT), and 2D‐NMR analyses, in combination with HR‐MS experiments and comparison with literature data of related compounds. 相似文献
19.
Ya‐Ching Shen Yu‐Chi Lin Yuan‐Bin Cheng Chia‐Ju Chang Ting‐Wei Lan Shorong‐Shii Liou Ching‐Te Chien Chia‐Ching Liaw Ashraf Taha Khalil 《Helvetica chimica acta》2008,91(3):483-494
Seven new oxygenated lignans, kadsuphilins G–M ( 1 – 7 , resp.), were isolated by chromatographic fractionation of an AcOEt extract of the aerial part of Kadsura philippinensis including four compounds with a dibenzocyclooctadiene skeleton, two with a bicyclooctane ring system, and one of 1,4‐biphenyldimethylbutane type. The structures of the isolated compounds were elucidated through extensive spectroscopic analyses, particularly 2D‐NMR experiments (HMQC, HMBC, and NOESY). The configuration of the chiral centers and the biphenyl moiety were determined by NOESY as well as CD spectroscopy, respectively. 相似文献
20.
Yong Shen Ai‐Xue Zuo Zhi‐Yong Jiang Xue‐Mei Zhang Hong‐Ling Wang Ji‐Jun Chen 《Helvetica chimica acta》2010,93(5):863-869
Four new C19‐nor‐diterpenoid alkaloids, named brachyaconitines A–D ( 1 – 4 ), were isolated from the roots of Aconitum brachypodum Diels. Their structures were elucidated as 3‐O‐acetyl‐20‐deethyl‐20‐formylaconitine ( 1 ), 3‐O‐acetyl‐19,20‐didehydro‐20‐deethylaconitine ( 2 ), 3‐O‐acetyl‐8‐de(acetyloxy)‐7,8,17,20‐tetradehydro‐20‐deethyl‐7,17‐secoaconitine ( 3 ), and 1‐O‐methylflavaconitine ( 4 ) by means of MS, IR, 1D‐ and 2D‐NMR analyses. The structure of compound 1 was confirmed by an X‐ray diffraction experiment. 相似文献