scholarly journals Four Flavan-3-ol Compounds From The Stembark of Chisocheton balansae C.DC. (MELIACEAE)

Molekul ◽  
2021 ◽  
Vol 16 (1) ◽  
pp. 9
Author(s):  
Unang Supratman ◽  
Mohamad Fajar ◽  
Supriatno Salam ◽  
Rani Maharani ◽  
Desi Harneti ◽  
...  
Keyword(s):  
Ethyl Acetate ◽  
13C Nmr ◽  
Chemical Structure ◽  
Ethyl Acetate Extract ◽  
2D Nmr ◽  
Stem Bark ◽  
Spectroscopic Methods ◽  
Endemic Plants ◽  
North Sulawesi ◽  
First Time

Chisocheton balansae C.DC., is one of the Meliaceae family plants which is the endemic plants from Soputan Mountain, North Sulawesi, Indonesia. This study was aimed to determine the chemical structure of flavan-3-ol compounds from ethyl acetate extract of C. balansae C.DC stembark. Dried powder of C. balansae C.DC stem bark was extracted consecutively with n-hexane, ethyl acetate, and methanol solvents. Four flavan-3-ol compounds, named catechin (1), epicatechin (2), epigallocatechin-3-O-gallate (3), and epicatechin-3-O-gallate (4) were successfully isolated from ethyl acetate extract. The chemical structure of these isolates was determined by spectroscopic methods (1H-NMR, 13C-NMR, DEPT, and 2D-NMR) and comparison with previous reported spectral data. These compounds are first time reported from this plant.

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 Triterpenoids from the Stem Bark of Crataeva nurvala

1970 ◽  
Vol 7 (1) ◽  
pp. 71-74 ◽  
Author(s):  
Md Enamul Haque ◽  
Md Nahidul Islam ◽  
Dipankar Das Gupta ◽  
Mahbub Hossain ◽  
Hossain Uddin Shekhar ◽  
...  
Keyword(s):  
Ethyl Acetate ◽  
Key Words ◽  
Silica Gel ◽  
1H Nmr ◽  
13C Nmr ◽  
Ethyl Acetate Extract ◽  
Stem Bark ◽  
First Report ◽  
Spectroscopic Analyses ◽  
Phytochemical Investigation

Two triterpenoids, phragmalin triacetate (1) and lupeol (2) were isolated from an ethyl acetate extract of the stem bark of Crataeva nurvala (Capparidaceae) by repeated chromatography over silica gel. The structures of these compounds were determined by spectroscopic analyses (UV, IR, 1H NMR, 13C NMR and EIMS). This is the first report of the systematic phytochemical investigation and the presence of these compounds 1 and 2 from this plant. Key words: Crataeva, Capparidaceae, Phragmalin triacetate and Lupeol.  DOI = 10.3329/dujps.v7i1.1221 Dhaka Univ. J. Pharm. Sci. 7(1): 71-74, 2008 (June)

scholarly journals Protoflavanones from the Wood Stem of Salvertia convallariodora

2017 ◽  
Vol 12 (4) ◽  
pp. 1934578X1701200
Author(s):  
Mariana L. de Mesquita ◽  
José E. de Paula ◽  
Laila S. Espindola ◽  
Luiz A. L. Soares ◽  
Tania M. G. da Silva ◽  
...  
Keyword(s):  
Ethyl Acetate ◽  
Ethyl Acetate Extract ◽  
2D Nmr ◽  
Phytochemical Analysis ◽  
Brazilian Cerrado ◽  
Stem Wood ◽  
Full Characterization ◽  
Glucosyl Ester ◽  
First Time

Phytochemical analysis of the ethyl acetate extract of stem wood of Salvertia convallariodora A. St.-Hil. (Vochysiaceae), a Brazilian Cerrado species, led to the isolation and full characterization of three new non-aromatic B-ring flavanones (1-3) as well as the terpene mixture of sericic acid (4), 24-hydroxytormentic acid (5), 24-hydroxytormentic acid glucosyl ester (6), and sericoside (7), all identified for the first time from S. convallariodora. The structures of the new flavanones (1-3) were established from IR, LC-PDA-qTOF-MS, and NMR spectral data, including 2D NMR experiments.

scholarly journals Flavonoids from the Roots of Amomum compactum Soland Ex Maton (Zingiberaceae)

2021 ◽  
Vol 7 (2) ◽  
pp. 142-149
Author(s):  
Deden Indra Dinata ◽  
Rani Maharani ◽  
Fauzan Zein Muttaqien ◽  
Unang Supratman ◽  
Mohamad Nurul Azmi ◽  
...  
Keyword(s):  
Chemical Structure ◽  
2D Nmr ◽  
Scavenging Activity ◽  
Endemic Plants ◽  
Spectroscopy Data ◽  
Chemical Structures ◽  
Dpph Scavenging Activity ◽  
Amomum Compactum ◽  
Dpph Scavenging ◽  
First Time

Amomum compactum Soland Ex Maton is one of the Zingiberaceae family plants which is the endemic plants from West Java, Indonesia. This study was aimed to determine the chemical structure of flavonoid compounds from n-hexane extract of A.compactum Sol. Ex Maton roots. Dried powder of the roots was extracted consecutively with n-hexane, ethyl acetate, and methanol solvents. Three flavonoids, 5-hydroxy-3,7,4`-trimethoxy kaempferol (1), 5-hydroxy-3,7,3',4'-tetra methoxy kaempferol (2) and 4'-hydroxy-3,5,7-trimethoxy kaempferol (3), have been isolated from the roots of A. compactum Sol. Ex Maton.  The chemical structures of compounds 1-3 were identified by spectroscopy data including infrared 1D-NMR, 2D-NMR and HRTOF-MS as well as by comparison with previously reported spectral data. Compounds 1-3 were isolated from this plant for the first time and showed free radical DPPH scavenging activity.

scholarly journals Cichorin A: a benzo-isochromene from Nypa fruticans endophytic fungus Pestalotiopsis sp.

2017 ◽  
Vol 63 (4) ◽  
pp. 13-17 ◽  
Author(s):  
Gideon O. Alade ◽  
Jones O. Moody ◽  
Olanrewaju R. Awotona ◽  
Daowan Lai ◽  
Saburi A. Adesanya ◽  
...  
Keyword(s):  
Ethyl Acetate ◽  
Endophytic Fungus ◽  
Host Plants ◽  
Ethyl Acetate Extract ◽  
Bioactive Metabolites ◽  
Spectroscopic Methods ◽  
Chromatographic Techniques ◽  
Nypa Fruticans ◽  
Isolated Compound ◽  
First Time

Summary Introduction: Similar bioactive metabolites are obtainable from host plants as well as the endophytic fungi residing in them. Objective: The aim of the study is to isolate the major compound(s) from the endophytic fungus residing in Nypa fruticans Wurmb, Arecaceae family. Methods: Purification of the ethyl acetate extract of the isolated endophytic fungus was performed by employing different chromatographic techniques and structural elucidation of the isolated compound was carried out using UV and NMR spectroscopic methods. Results: Cichorin A was isolated from the ethyl acetate extract of the solid rice cultures of Pestalotiopsis sp., isolated from N. fruticans, collected in Nigeria. Conclusions: This compound is being isolated for the first time from a fungus; it is commonly isolated from the plant Cichorium intybus L. (Compositae).

scholarly journals 4-ETOKSI-3-METOKSIFENOL DAN METIL-3,4-DIHIDROKSIBENZOAT, DUA SENYAWA TURUNAN FENOLIK DARI EKSTRAK ETIL ASETAT KULIT UMBI GADUNG (Dioscorea hispida Dennst) DAN AKTIVITAS ANTIOKSIDAN EKSTRAK ETIL ASETAT

2018 ◽  
Vol 3 (1) ◽  
pp. 71
Author(s):  
Nanik Siti Aminah ◽  
Alfinda Novi Kristanti ◽  
Qonitah Labibah ◽  
Ana Firdausyah ◽  
Yoshiaki Takaya
Keyword(s):  
Ethyl Acetate ◽  
Ethyl Acetate Extract ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
2D Nmr ◽  
Free Radical Scavenging ◽  
Spectroscopic Methods ◽  
Separation And Purification ◽  
Activity Assay ◽  
Vacuum Liquid Chromatography

Two phenolic compoundnamely 4-ethoxy-3-methoxyphenol and methyl-3,4-dihydroxybenzoic have been isolated fromDioscorea hispida Dennst. The isolation of phenolic compounds was done by maceration methods using methanol, followed by partition with n-hexane and ethyl acetate. The process of separation and purification used various chromatography techniques including vacuum liquid chromatography, column chromatography, and radial chromatography. The structure of isolated compounds were determined by spectroscopic methods including UV-Vis, IR, 1D and 2D NMR. The ethyl acetate extract was evaluated for DPPH free radical scavenging activity assay. The IC50of ethyl acetate extract was 415 ppm. The result of this assay indicated that ethyl acetate extract has a potential as an antioxidant.  Keywords: Dioscorea hispida Dennst, Dioscoreaceae, phenolic, 4-ethoxy-3-methoxyphenol, methyl-3,4-dihydroxybenzoic, and antioxidant

scholarly journals ISOLASI KUMARIN DARI KULIT BUAH LIMAU SUNDAI (Citrus nobilis Lour)

2017 ◽  
Vol 18 (02) ◽  
pp. 137-145
Author(s):  
Melindra Mulia
Keyword(s):  
Melting Point ◽  
Ir Spectra ◽  
Ethyl Acetate ◽  
1H Nmr ◽  
Column Chromatography ◽  
13C Nmr ◽  
Ethyl Acetate Extract ◽  
2D Nmr ◽  
White Needle ◽  
Pure White

Coumarin has been isolated and characteritated from rind of  Citrus nobilis Lour by maseration methode with methanol. After fractionation by n-hexane and ethyl acetate, collected the phase ethyl acetate which positive of coumarin. From ethyl acetate extract coumarin have been isolated by column chromatography. The isolation results was obtain 2,159 g of pure white needle-shape crystalline with the melting point of 126,2-127,60C. Structure of the isolated coumarine was elucidated by spectroscopic methodes, UV-Vis,13C-NMR, 1H-NMR, 2D-NMR (DEPT/HSQC, COSY, NOESY, HMBC) and IR spectra. Based on the spectra data the isolated coumarine is marmin.

scholarly journals THE ANTIBACTERIAL COMPOUND COLLISMICIN A DERIVED FROM MARINE Streptomyces sp Q-629K

2010 ◽  
Vol 8 (3) ◽  
pp. 426-430
Author(s):  
Tutik Murniasih ◽  
Kyoko Adachi
Keyword(s):  
Ethyl Acetate ◽  
Secondary Metabolite ◽  
13C Nmr ◽  
Active Compound ◽  
Chemical Structure ◽  
Ethyl Acetate Extract ◽  
Water System ◽  
Antimicrobial Compound ◽  
Streptomyces Sp

In our course of screening for secondary metabolite derived from marine bacterial, we isolate the antimicrobial compound collysmicin A from the ethyl acetate extract of Streptomyces sp Q-629K. Separation of this compound was carried out by silica gel open column chromatography. Purification of an active compound was done using HPLC C18 with acetonitril-water system. Determination of chemical structure was done by 1H, 13C NMR and LC-MS analysis. Collysmicin A was contained in fraction 3, fraction 7.2 and fraction 8.7. The antimicrobial assayed from purified compound Fr.8.7 gave diameter inhibition approximately 13 mm against S. aureus and 12 mm against B. subtilis .   Keywords: antimicrobial, collismycin A and marine Streptomyces sp

CHEMICAL CONSTITUENTS OF ETHYL ACETATE EXTRACT FROM Taxus wallichiana ZUCC. (TAXACEAE) LEAVES COLLECTED IN HA GIANG PROVINCE

2020 ◽  
Vol 65 (6) ◽  
pp. 110-115
Author(s):  
Dien Pham Huu ◽  
My Pham Thi ◽  
Nam Bui Tuan
Keyword(s):  
Ethyl Acetate ◽  
Ethyl Acetate Extract ◽  
Chemical Constituents ◽  
Spectroscopic Methods ◽  
First Time ◽  
Taxus Wallichiana

Investigation on the chemical constituents of ethyl acetate extract from leaves of Taxus wallichiana Zucc. (Taxaceae), collected in Ha Giang province, has resulted in the isolation of three metabolites for the first time: sciadopitysin (1), β-sitosterol (2), and isoquercitrin (3). Their structures were determined by spectroscopic methods.

scholarly journals Stigmasterol, rengyolone, 2-phenylethyl β-D-glucopyranoside and n-tetradecyl-β-D-glucopyranoside from the flowers of Nyctanthes arbor-tristis Linn

2019 ◽  
Vol 54 (3) ◽  
pp. 275-282 ◽  
Author(s):  
MM Haque ◽  
N Sultana ◽  
SMT Abedin ◽  
SE Kabir
Keyword(s):  
Ethyl Acetate ◽  
1H Nmr ◽  
13C Nmr ◽  
Ethyl Acetate Extract ◽  
Natural Sources ◽  
Chromatographic Techniques ◽  
Phytochemical Investigation ◽  
First Time

A phytochemical investigation was conducted on the flowers of Nyctanthesarbor-tristis Linn. For isolation of compounds, the dried flower’s powder was successively extracted with n-hexane, dichloromethane, ethyl acetate and methanol. The extracts were fractionated using different chromatographic techniques and four compounds were isolated. Stigmasterol (1) from n-hexane, rengyolone (2) from dichloromethane and two other compounds namely, 2-phenylethyl β-D-glucopyranoside (3) and n-tetradecyl-β-D-glucopyranoside (4) from ethyl acetate extract, were isolated. These compounds (1-4) were characterized on the basis of IR, 1H NMR, 13C NMR, DEPT-135 NMR. Compounds 1 and 3 were isolated for the first time from this plant while compound 4 has been isolated and completely characterized from this plant as well as from the natural sources. Bangladesh J. Sci. Ind. Res.54(3), 275-282, 2019

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