Study on the Chemical Constituents of Apocynum venetum Bark

2011 ◽  
Vol 284-286 ◽  
pp. 2119-2122
Author(s):  
Ming Hua Li ◽  
Guang Ting Han ◽  
Hao Chen ◽  
Jian Yong Yu ◽  
Yuan Ming Zhang
Keyword(s):  
Methyl Ester ◽  
Benzoic Acid ◽  
Ir Spectra ◽  
Silica Gel ◽  
Chemical Constituents ◽  
Acid Methyl Ester ◽  
Alcoholic Extract ◽  
Acid Methyl ◽  
Apocynum Venetum ◽  
First Time

The alcoholic extract of the Apocynum venentum (AV)bark were purified by silica gel column chromatography. The isolated chemical constituents were identified by MS, NMR, IR spectra. The main chemicals isolated from AV bark were quercetin (1), kaempferol (2), isoquercitrin (3), luteolin (4), hyperoside(5), 7-hydroxy-6-methoxy-2H-1-benzopyran-2-one (6), b-sitosterol (7), stigmasterol (8), 3, 4-dihydroxy-benzoic acid methyl ester (9), 3, 5-dihydroxybenzaldehyde (10) and 3, 4-dihydroxy-benzoic acid (11). The compounds (1)～(6) and (8)～(11) were obtained from AV bark for the first time.

Chemical Constituents of Lavatera trimestris L. – Antioxidant and Antimicrobial Activities

2007 ◽  
Vol 62 (11-12) ◽  
pp. 797-800 ◽  
Author(s):  
Krystyna Skalicka-Woźniak ◽  
Eleni Melliou ◽  
Olga Gortzi ◽  
Kazimierz Glowniak ◽  
Ioanna B. Chinou
Keyword(s):  
Methyl Ester ◽  
Methanolic Extract ◽  
Chemical Constituents ◽  
Acid Methyl Ester ◽  
Antimicrobial Activities ◽  
Coumaric Acid ◽  
Chromatographic Techniques ◽  
Acid Methyl ◽  
Phenolic Esters ◽  
First Time

Nine phenolic compounds, such as cis-/trans-p-coumaric acid, cis-/trans-p-coumaric acid methyl ester, glucose ester of cis-/trans-p-coumaric acid, caffeic acid methyl ester, kaempferol 7-O-β-d-glucoside and kaempferol 3-O-β-d-glucoside, were isolated from Lavatera trimestris flowers by chromatographic techniques and their structures were elucidated by spectral means (NMR). All compounds were tested for their antioxidant activity, while the methanolic extract was tested also for its antimicrobial activity. Also several non-polar constituents have been identified using GC and GC/MS methods. This is the first time that phenolic esters and non-polar constituents were identified in the flowers of L. trimestris L.

scholarly journals Chemical Constituents of Pyrrosia calvata

2015 ◽  
Vol 10 (7) ◽  
pp. 1934578X1501000
Author(s):  
Yu-Jie Chen ◽  
Guo-Yong Xie ◽  
Guang-Kai Xu ◽  
Yi-Qun Dai ◽  
Lu Shi ◽  
...  
Keyword(s):  
Methyl Ester ◽  
Chemical Constituents ◽  
Acid Methyl Ester ◽  
Caffeoylquinic Acid ◽  
Acid Methyl ◽  
Dicaffeoylquinic Acid ◽  
Whole Plant ◽  
The Family ◽  
First Time ◽  
Flavanone Glycoside

A novel flavanone glycoside, 3′,5′,5,7-tetrahydroxy-6- C- β-D-glucopyranosyl-flavanone (1), along with 16 known compounds, ( R/ S)-eriodictyol-8- C- β-D-glucopyranoside (2), quercetin-3- O- α-D-rhamnosyl (1′”→3′”)- β-D-glucopyranoside (3), hemipholin (4), 4 β-carboxymethyl-(-)-epicatechin methyl ester (5), kaempferol (6), quercetin (7), mangiferin (8), chlorogenic acid (9), 1,5- O-dicaffeoylquinic acid (10), 3,5- O-dicaffeoylquinic acid (11), 3- O-caffeoylquinic acid methyl ester (12), 1- O-caffeoyl glycoside (13), 4- O- β-D-glucopyranosyl-caffeic acid (14), 3′- O-methyleplcatechin-7- O- β-D-glucopyranoside (15), hop-22(29)-en-30-ol (16) and diploptene (17), were isolated from the whole plant of Pyrrosia calvata (Backer) Ching. Among them, compounds 2, 3, 4, 10, 11, 13 and 14 were isolated from the family Polypodiaceae for the first time, and compound 5 has not been recorded previously from the genus Pyrrosia.

scholarly journals Chemical Constituents of Eleutherococcus sessiliflorus (Rupr. & Maxim.)

2020 ◽  
Vol 15 (2) ◽  
pp. 1934578X2090576
Author(s):  
Ye Ma ◽  
Donghu Zhang ◽  
Mingyan Jiang
Keyword(s):  
Methyl Ester ◽  
Physicochemical Properties ◽  
A549 Cell ◽  
Chemical Constituents ◽  
Acid Methyl Ester ◽  
Ethanol Extract ◽  
A549 Cell Line ◽  
Acid Methyl ◽  
First Time ◽  
Dehydrodiconiferyl Alcohol

Ten compounds were separated and purified by chromatographic methods from the 70% ethanol extract of the leaves of Eleutherococcus sessiliflorus (Rupr. & Maxim.). Their structures were identified according to their physicochemical properties and the spectral data of dihydromyricetin (1), quercetin (2), taxifolin (3), naringenin (4), liquiritigenin (5), butein (6), syringaresinol (7), dehydrodiconiferyl alcohol (8), gallic acid methyl ester (9), and alphitolic acid (10). Compounds 1, 3, 6, and 10 were isolated from the genus Eleutherococcus for the first time. All compounds showed weak cytotoxic activity against the A549 cell line.

scholarly journals Azukisapogenol Triterpene Glycosides from Oxytropis chiliophylla Royle

Molecules ◽  
2018 ◽  
Vol 23 (10) ◽  
pp. 2448
Author(s):  
Jun Wang ◽  
Hongshuai Yang ◽  
Yang Liu ◽  
Kelsang Norbo ◽  
Kewu Zeng ◽  
...  
Keyword(s):  
Methyl Ester ◽  
Glucuronic Acid ◽  
Acid Methyl Ester ◽  
Triterpene Glycosides ◽  
Raw 264.7 Cells ◽  
No Production ◽  
Acid Methyl ◽  
Potent Inhibition ◽  
New Compounds ◽  
First Time

Eight azukisapogenol triterpene glycosides, including five new compounds, oxychiliotriterpenosides A–E (1–5), two new methyl glucuronide derivatives that proved to be artifacts, oxychiliotriterpenoside E-glucuronic acid methyl ester (6) and myrioside B-glucuronic acid methyl ester (7), and a known one, myrioside B (8), was isolated from the aerial part of Oxytropis chiliophylla Royle. Their structures were elucidated based on extensive spectroscopic analyses and chemical methods. Triterpene glycosides were first obtained from O. chiliophylla, and those containing a galactose unit (1, 2, 5 and 6) and diglucosidic or triglucosidic linkage at C-29 (1–4), were reported from Oxytropis species for the first time, which might be recognized as a chemotaxonomic feature of O. chiliophylla. All isolated compounds were evaluated for their anti-inflammatory activities against NO production using lipopolysaccharide (LPS)-induced RAW 264.7 cells, but no compounds showed potent inhibition on NO production.

scholarly journals CHEMICAL CONSTITUENTS OF Bischofia javanica

2017 ◽  
Vol 55 (2) ◽  
pp. 188
Author(s):  
Nguyen Thi Mai
Keyword(s):  
Methyl Ester ◽  
Gallic Acid ◽  
Nmr Spectra ◽  
Methanol Extract ◽  
Chemical Constituents ◽  
Acid Methyl Ester ◽  
First Report ◽  
Acid Methyl ◽  
Bischofia Javanica ◽  
Reported Data

From the methanol extract of Bischofia javanica leaves, five compounds including 5'-b-D-glucopyranosyloxyjasmonic acid methyl ester (1), 2-(4-hydroxy-3-methoxyphenyl)ethyl-O-β-D-glucopyranoside (2), hexyl-O-β-D-glucopyranoside (3), friedelan-3-one (4), and gallic acid (5) were isolated. Their structures were elucidated by NMR spectra as well as in comparison with previous reported data. This is the first report of 1 and 2 from Bischofia javanica.

scholarly journals Volatile Components from Selected Tahitian Liverworts

2009 ◽  
Vol 4 (10) ◽  
pp. 1934578X0900401 ◽  
Author(s):  
Agnieszka Ludwiczuk ◽  
Ismiarni Komala ◽  
André Pham ◽  
Jean-Pierre Bianchini ◽  
Phila Raharivelomanana ◽  
...  
Keyword(s):  
Methyl Ester ◽  
Vanillic Acid ◽  
Acid Methyl Ester ◽  
Volatile Components ◽  
Acid Methyl ◽  
Unpleasant Odor ◽  
First Time

Six Tahitian liverworts, Trichocolea pluma, Chandonanthus hirtellus, Mastigophora diclados, Jungermannia sp., Plagiochila sp. and Cyathodium foetidissimum were chemically investigated. All of these liverworts produce their own characteristic compounds. Vanillic acid methyl ester was isolated for the first time from T. pluma. Skatol is responsible for the very intense unpleasant odor of C. foetidissimum. Herbertane-type sesquiterpenoids are peculiar components of M. diclados, and fusicoccane-type diterpenoids were identified in Pagiochila sp. Cembranes and ent-verticillanes were isolated from C. hirtellus and also detected in Jungermannia species. C. hirtellus also biosynthesizes algal components and such results may suggest that some liverworts originate from algae.

scholarly journals Phytochemical Profiling and Larval Control of Erythrina variegata Methanol Fraction against Malarial and Filarial Vector

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Mathalaimuthu Baranitharan ◽  
Barbara Sawicka ◽  
Jayapal Gokulakrishnan
Keyword(s):  
Methyl Ester ◽  
Methanol Extract ◽  
Mosquito Control ◽  
Chemical Constituents ◽  
Octadecenoic Acid ◽  
Acid Methyl Ester ◽  
Methanol Fraction ◽  
Mass Spectral ◽  
Erythrina Variegata ◽  
Acid Methyl

Erythrina variegata (E. variegata) bioactive chemical has been the potential to be utilized as a good, eco-friendly approach for the control of mosquito population. In the present investigation, methanol extract using insecticidal compounds isolated against mosquito larvae kill assay was carried out. Secondary metabolism was characterized by thin layer chromatography, column chromatography, Fourier transform-infrared spectroscopy, gas chromatography-mass spectral, and identification of compound. Mosquito immature third instar larval, Anopheles stephensi, and Culex quinquefasciatus have been exposed to different concentrations of 50-250 µg/ml. Totally, larvae were death rate 98.2% (significant value 0.001b) from methanol extract and it is significant toxicity against larvae of An. stephensi and Cx. quinquefasciatus with LC50/LC99 values were 157.69/339.55 µg/ml and 137.67/297.33 µg/ml, respectively. FT-IR analysis in the functional groups such as alcohol, amines, amides, alkenes, 1⁎ amines, aromatic amines, aliphatic amines, 1⁎,2⁎ amines, and alkyl halides searched the identity of secondary metabolites, which may act as 12-Octadecenoic acid, methyl ester compound and clearly indicates being phytochemical. Chemical constituents of twenty-five compounds were identified in the methanol extract. The major components were 12-Octadecenoic acid and methyl ester (37.31%). Compound molecules consist of carbon 19 atoms (gray), hydrogen 36 atoms (greenish blue), and oxygen 2 atoms (red), indicated by the different colors. The results were obtained suggesting that, in addition to their pharmaceutical and medicine sources, 12-Octadecenoic acid, methyl ester compound can also serve as a natural mosquito control.

Derivate des Benzo[1.3]dioxols, 431 Über Benzo [1.3] dioxolcarbonsäuren / Derivatives of 1,3-Benzodioxoles, 43 1,3-Benzodioxolecarboxylic Acids

1978 ◽  
Vol 33 (7-8) ◽  
pp. 465-471
Author(s):  
Franz Daliacker ◽  
Volker Mues ◽  
In-O Kim
Keyword(s):  
Carboxylic Acid ◽  
Methyl Ester ◽  
Benzoic Acid ◽  
Myristic Acid ◽  
Good Yield ◽  
Acid Ester ◽  
Acid Methyl Ester ◽  
Acid Methyl ◽  
Derivatives Of

Abstract We describe the possibilities of formation and preparation of the “natural” 1,3-benzodioxolecarboxylic acids 1, 2, 4, 6 b, and 7, already mentioned in literature. Myristic acid (3e) was prepared in good yield from 3-methoxy-4,5-dihydroxy-benzoic acid ester (3c) , which could be easily made from 3-methoxy-2,3-carbonyldioxy-benzoic acid methylester (3b). Myristicic acid methylester (3d) could be subjected to methylation and hydrolysis leading to 3e without any difficulties. 4.6-dimethoxy-1,3-benzodioxole-5-carboxylic acid (5b) was prepared in good yields by oxidation of 4,6-dimethoxy-1,3-benzodioxole-5-aldehyde (5a). 5.7-dimethoxy-1,3-benzodioxole-carboxylic acid (13f), one of the “unnatural” 1,3-benzodioxolecarboxylic acids, derivatives of o-ipiperonylic acid (8), was prepared from 5-amino-7-methoxy-1,3- benzodioxole-4carboxylic acid methyl ester (13b) by diazotisation, elimination of nitrogen, methylation, and hydrolysis. A comparison of our measured pkA-values showed the strongest acidity belonging to 5,6-dimethoxy-1,3-benzodioxole-4-carbocylic acid (11).

Sign in / Sign up

Export Citation Format

Share Document