scholarly journals Investigation of chemical constituents of the leaves from Kalanchoe pinnata L. (Crassulaceae)

2013 ◽  
Vol 16 (2) ◽  
pp. 47-52
Author(s):  
Phu Hoang Dang ◽  
Phuong Thi Yen Duong ◽  
Trong Nguyen Huu Phan ◽  
Thy Anh Nguyen ◽  
Nhan Trung Nguyen
Keyword(s):  
Phenolic Compounds ◽  
Nmr Spectroscopy ◽  
Ferulic Acid ◽  
Ethyl Acetate ◽  
Chemical Constituents ◽  
Published Data ◽  
Chemical Structures ◽  
Kalanchoe Pinnata ◽  
Isoferulic Acid ◽  
Ethyl Acetate Extracts

From the chloroform and ethyl acetate extracts of the leaves of Kalanchoe pinnata L. (Crassulaceae), two flavonoids and three phenolic compounds were isolated; named quercetin (1), 5,7,4’-trihydroxy-8,3’-dimethoxyflavone (2), gallic acid (3), ferulic acid (4) and isoferulic acid (5). Based on the NMR spectroscopy, their chemical structures were elucidated and the result was confirmed by comparison with published data.

scholarly journals CHEMICAL CONSTITUENTS OF THE SEED OF CASSIA OCCIDENTALIS L. (CAESALPINIACEAE).

2011 ◽  
Vol 14 (2) ◽  
pp. 89-95
Author(s):  
Nhan Trung Nguyen ◽  
Mai Thi Phuong Pham ◽  
Mai Thi Thanh Nguyen
Keyword(s):  
Ferulic Acid ◽  
Chemical Constituents ◽  
Chloroform Extract ◽  
Published Data ◽  
Spectroscopic Methods ◽  
Cassia Occidentalis ◽  
Chemical Structures

From the chloroform extract of the seed of Cassia occidentalis L., which was collected in Dong Nai province, four compounds were isolated: emodin (1), ferulic acid (2), quercetin (3) and tectochryzin (4). Their chemical structures were elucidated by using spectroscopic methods and comparision with published data.

scholarly journals The phytochemical investigation from n-hexane extract of the lichen Roccella montagnei

2021 ◽  
Vol 24 (2) ◽  
pp. first
Author(s):  
Thu Thi-Hoai Nguyen ◽  
Duong Thuc Huy
Keyword(s):  
Ethyl Acetate ◽  
Hexane Extract ◽  
Published Data ◽  
Chemical Structures ◽  
Nmr Data ◽  
Phytochemical Investigation ◽  
Partition Method ◽  
First Time ◽  
Ethyl Acetate Extracts

Introduction: R occella montagnei is widely distributed in subtropical regions. As the continuous study on the hexane extract of Roccella montagnei lichen, the isolation and structural determination of five compounds were addressed. Method: The crude extract was obtained from the dried lichen powder's extraction at room temperature. The n-hexane, n-hexane-ethyl acetate, and ethyl acetate extracts were obtained by the liquid-liquid partition method. The organic compounds were isolated from n-hexane extract by silica gel and Sephadex LH-20 column chromatography. Their chemical structures were identified by the NMR and HR-ESI-MS data analysis and the comparison of their NMR data with the published data. Results: Five compounds were isolated and chemically structural identified, consisting of 3b -hydroxy-7a-methoxystigmast-5-ene (1), sekikaic acid (2), lichenxanthone (3), (+)-6,8-dihydroxy-3-propyl-3,4-dihydroisocoumarin (4), and ar-turmerone (5). Conclusion: To the best of our knowledge, except 3 which was reported from this species for the first time, four isolated compounds left did not known to be present in Roccella genus before.

scholarly journals Chemical constituents from the ethyl acetate and n-butanol extracts of the stems of Buchanania lucida Blume (Anacardiaceae)

2018 ◽  
Vol 1 (T5) ◽  
pp. 167-171
Author(s):  
Tung Thanh Nguyen ◽  
Thuong Thi Nguyen ◽  
Phu Hoang Dang ◽  
Trong Nguyen Huu Phan ◽  
Nhan Trung Nguyen
Keyword(s):  
Phenolic Compounds ◽  
Methyl Ester ◽  
Ethyl Acetate ◽  
Nmr Spectra ◽  
Chemical Structure ◽  
Chemical Constituents ◽  
2D Nmr ◽  
Published Data ◽  
2D Nmr Spectra ◽  
Aloe Emodin

There is no research on the chemical constituents investigation and bioactivity evaluation of Buchanania lucida Blume (Anacardiaceae). From the stems of Buchanania lucida collected at Dong Nai province, the ethyl acetate and n-butanol extracts were prepared. Four phenolic compounds: protocatechuic methyl ester (1), aloe-emodin (2), naringenin (3), and glucosyringic acid (4) were isolated from these extracts. The chemical structure of these compounds were elucidated by 1D and 2D NMR spectra and comparison with published data. These compounds were first reported in Buchanania lucida.

scholarly journals Chemical constituents of the ethyl acetate extract from the leaf of mugwort (Artemisia vulgaris L.)

2019 ◽  
Vol 22 (4) ◽  
pp. 352-255
Author(s):  
Truong Van Nguyen Thien ◽  
Thien Tai Phan ◽  
Tung Thanh Phan ◽  
Lien Kim Thi Tran ◽  
Nhu Tiet Thi Tran ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Ethyl Acetate ◽  
Chemical Constituents ◽  
Ethyl Acetate Fraction ◽  
Published Data ◽  
Artemisia Vulgaris ◽  
Reduced Pressure ◽  
Medicinal Uses ◽  
Voucher Specimen ◽  
Phenyl Propanoid

Introduction: Mugwort (Artemisia vulgaris L.) is a familiar herbal medicine and also a daily vegetable. It is one of the ingredients in the famous remedy "Cao ích mẫu" specializing in menstrual disorders or the omelet with mugwort that helps save blood flow to the brain to treat headaches. In both traditional medicine and the new drugs, diseases are usually treated by mugwort as diabetes, epilepsy combination for psychoneurosis, depression, irritability, insomnia, anxiety, and stress. To demonstrate the medicinal uses, the chemical constituents of this herbal were continually studied. Methods: The leaves of mugwort were collected in Ba Ria - Vung Tau province, Vietnam. The plant was identified by the late pharmacist and botanist Binh Duc Phan. A voucher specimen (AV001) was deposited in the herbarium of the Department of Organic Chemistry, VNUHCM–University of Science. Dried leaf powder of A. vulgaris (11 kg) was extracted with methanol and evaporated under reduced pressure to give a methanol extract (910 g), which was dissolved in methanol-water (1:9) and then successively partitioned with petroleum ether, chloroform, and ethyl acetate. From the previously researched ethyl acetate fraction, nine compounds were isolated: six known phenolic compounds (luteolin, 6-methoxyluteolin, eupatilin, o-coumaric acid, vanillic acid, and protocatechuic acid), sinapyl alcohol diisovalerate, vulgarin, and one new compound (artanoic acid). Results: In this research, ethyl acetate fraction was also studied. From subfraction EA4, six compounds were isolated by three skeletons: phenolic compounds (5,4′ -dihydroxyflavone and 4-hydroxyphenyl acetate), phenyl propanoid (methyl 2-O-b -D-glucopyranosylcoumarate and 2-O-b -D-glucopyranosylcoumaric acid) and uracil (5-methyluracil and uridine). The structure of the isolated compounds was determined to base on 1D, 2D NMR spectra, HR-ESI-MS, and comparison with published data. Conclusion: Particularly, four compounds (methyl 2-O-b -D-glucopyranosylcoumarate, 2-O-b -D-glucopyranosylcoumaric acid, 5-methyluracil, and uridine) were known for the first time from this species.  

scholarly journals CONTRIBUTE TO STUDY ON CHEMICAL CONSTITUENTS OF URENA LOBATA (L.) OF VIETNAM

2019 ◽  
Vol 57 (2) ◽  
pp. 162
Author(s):  
Quan Minh Pham ◽  
Hoai Van Thi Tran ◽  
Lam Tien Do ◽  
Phuong Lan Doan ◽  
Inh Thi Cam ◽  
...  
Keyword(s):  
Mental Disorders ◽  
Ethyl Acetate ◽  
Ethyl Acetate Extract ◽  
Chemical Constituents ◽  
2D Nmr ◽  
Spectroscopic Methods ◽  
Tree Roots ◽  
Chemical Structures ◽  
Phytochemical Investigation ◽  
First Time

Urena lobata L. is used in Vietnamese traditional medicine for the treatment of several diseases. Tree roots are used to treat rheumatism, dysentery, poor digestion, flu, tonsils, malaria, asthma, goiter. Flowers are used to treat chickenpox, fever, and mental disorders. Branches, leaves or whole trees used to treat injuries bruises, rheumatism, mastitis, bites. Phytochemical investigation of the n-hexan and ethyl acetate extract of Urena lobata L. led to the isolation of β-sitosterol (1), β-sitosterol-3-O-β-D-glucopyranoside (2), a-acetylamino-phenylpropyl a-benzoylamino-phenylpropanoate (3), quercetin (4), and trans-tiliroside (5). Their chemical structures were determined by spectroscopic methods including MS, 1D, 2D NMR and comparing with those reported in previous papers. Two compounds 3, 5 were isolated for the first time from Urena lobata plant.

scholarly journals Studies on Chemical Constituents and Biological Activities of an Endophytic Fungi from Magnifera indica L.

2015 ◽  
Vol 13 (1) ◽  
pp. 63-67
Author(s):  
Mozammel Haque ◽  
Mohammad Shoeb ◽  
Nilufar Nahar
Keyword(s):  
Ethyl Acetate ◽  
Ethyl Acetate Extract ◽  
Biological Activities ◽  
Chemical Constituents ◽  
Radical Scavenging ◽  
Acid Methyl Ester ◽  
Diffusion Method ◽  
Published Data ◽  
Nmr Studies ◽  
Brine Shrimp Lethality Assay

Two compounds, ergosterol (1) and 4-hydroxy-hexadec-6-enoic acid methyl ester (2) were isolated from the ethyl acetate extract of the endophytic fungal strain labeled as MI-3, isolated from the leave of Magnifera indica L. The structures of the isolated compounds were elucidated by 1H NMR studies and comparing with published data. The crude ethyl acetate extract, three column fractions and ergosterol were tested for antimicrobial activity against five Gram-positive and eight Gram-negative bacteria and three fungi by disc diffusion method. The general toxicity and antioxidant activity of the parent extract, column fractions and ergosterol were also evaluated by using brine shrimp lethality assay and free radical scavenging assay, respectively. Low activities were observed in all cases. DOI: http://dx.doi.org/10.3329/dujps.v13i1.21862 Dhaka Univ. J. Pharm. Sci. 13(1): 63-67, 2014 (June)

scholarly journals Bio Active Compound Analysis of Croton scabiosus Bedd: By HPTLC, GC-MS and Evaluation of Anthelmintic Activity and Anticancer Potential on Lung (A549) and Breast (MCF-7) Cancer Cell Lines

2021 ◽  
pp. 45-53
Author(s):  
E. Bhargav ◽  
S. Salamma ◽  
B. Chandana ◽  
S. Harika ◽  
M. Vijaya Jyothi ◽  
...  
Keyword(s):  
Ethyl Acetate ◽  
Chemical Constituents ◽  
Anthelmintic Activity ◽  
Spectral Studies ◽  
Breast Adenocarcinoma ◽  
Endemic Plant ◽  
Lung Adenocarcinoma Cell Line ◽  
Snake Bites ◽  
Mcf 7 ◽  
Ethyl Acetate Extracts

Croton scabiosus Bedd. (Euphorbiaceae) is an endemic plant of Andhra Pradesh, India. Local communities use the verdant parts of this plant as an antidote to treat snake bites and as a remedy to heal leucorrhoea in the form of decoction. In the present study the author found to have a perceptible range of alkaloids, coumarins, glycosides, flavonoids, steroids and gallic tannins as secondary metabolites by phytochemical and spectral studies. Since flavonoids and alkaloids are known for remarkable anticancer and anthelmintic activities respectively, the researcher is interested to document the research findings on these activities.The present research is aimed to evaluate bioactive principles present in acetone, chloroform and ethyl acetate extracts of Croton scabiosus Bedd. by chemical tests and spectral analysis. It is also aimed to study the anthelmintic and anticancer potential of these extracts.Acetone, chloroform and ethyl acetate extracts of Croton scabiosus Bedd. were prepared by triple maceration technique. GC-MS and HPTLC analysis were performed to identify chemical constituents.  Anthelmintic and anticancer potential was assessed for the three extracts. Owing to the positive results of chemical constituents, the researcher made an attempt to evaluate anthelmintic, cytotoxic potential and anticancer activity on breast adenocarcinoma cells (MCF-7) and lung adenocarcinoma cell line (A549). It was pointed to appraise Croton scabiosus Bedd. extracts have considerable Anthelmintic, cytotoxic and anticancer potential.

scholarly journals Investigation of bioative compounds from the ethyl acetate extract of Euphorbia hirta Linn

2018 ◽  
Vol 1 (T5) ◽  
pp. 95-101
Author(s):  
Ngan Thi Kim Tran ◽  
Ly Thi Le ◽  
Nhi Thi Y Nguyen ◽  
Minh Thi Tran ◽  
Quan Le Tran
Keyword(s):  
Ethyl Acetate ◽  
Ethyl Acetate Extract ◽  
Biological Activities ◽  
Gastrointestinal Disorders ◽  
Published Data ◽  
Spectroscopic Methods ◽  
Asian Countries ◽  
Euphorbia Hirta ◽  
Chemical Structures ◽  
The Past

Euphorbia hirta Linn. (co sua la lon in Vietnamese) belongs to Euphorbiaceae family, is a group of small prostrate herbaceous annual weed in Vietnam. It is abundant in waste places and open grasslands and distributes in most Asian countries. E. hirta is traditionally used in the treatment of gastrointestinal disorders, bronchial and respiratory. The aqueous extract exhibits anxiolytic, analgesic, antipyretic, and anti-inflammatory activities. Strong anti-diabetic activity of Euphorbiaceae family in general and E. hirta in particular was reported in the past investigations. E. hirta has been studied by various investigations and several active constituents have been isolated and identified successfully. Most of those compounds have strong biological activities. At the first step in the processing of the isolation of bioactive compounds from the ethyl acetate extract, we isolated four purified compounds, including methyl gallate (1), quercetin (2), myrecitin (3), and quercitrin (4). The chemical structures of those compounds were elucidated by spectroscopic methods and compared with published data in the literature.

scholarly journals Isolation and Bioactivity Analysis of Ethyl Acetate Extract fromAcer tegmentosumUsing In Vitro Assay and On-Line Screening HPLC-ABTS+System

2014 ◽  
Vol 2014 ◽  
pp. 1-15 ◽  
Author(s):  
Kwang Jin Lee ◽  
Na-Young Song ◽  
You Chang Oh ◽  
Won-Kyung Cho ◽  
Jin Yeul Ma
Keyword(s):  
Phenolic Compounds ◽  
Ethyl Acetate ◽  
Silica Gel ◽  
Hot Water ◽  
Assay Method ◽  
Vitro Assay ◽  
Chemical Structures ◽  
Freeze Dried ◽  
On Line

TheAcer tegmentosum(3 kg) was extracted using hot water, and the freeze-dried extract powder was partitioned successively using dichloromethane (DCM), ethyl acetate (EA), butyl alcohol (n-BuOH), and water. From the EA extract fraction (1.24 g), five phenolic compounds were isolated by the silica gel, octadecyl silica gel, and Sephadex LH-20 column chromatography. Based on spectroscopic methods such as1H-NMR,13C-NMR, and LC/MS the chemical structures of the compounds were confirmed as feniculin (1), avicularin (2), (+)-catechin (3), (−)-epicatechin (4), and 6′-O-galloyl salidroside (5). Moreover, a rapid on-line screening HPLC-ABTS+system for individual bioactivity of the EA-soluble fraction (five phenolic compounds) was developed. The results indicated that compounds1and2were first isolated from theA. tegmentosum. The anti-inflammatory activities and on-line screening HPLC-ABTS+assay method of these compounds in LPS-stimulated murine macrophages were rapid and efficient for the investigation of bioactivity ofA. tegmentosum.

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