scholarly journals DIPRENYLATED XANTHONE FROM THE STEM BARK OF KANDIS GAJAH (Garcinia griffithii)

2010 ◽  
Vol 8 (1) ◽  
pp. 97-100
Author(s):  
Elfita Elfita ◽  
Supriyatna Supriyatna ◽  
Husen H. Bahti ◽  
Dachriyanus Dachriyanus
Keyword(s):  
1H Nmr ◽  
13C Nmr ◽  
Spectroscopic Data ◽  
Stem Bark ◽  
First Time

A diprenylated xanthone, 1,5-dihydroxy-3-methoxy-4,7-diprenylxanthone (1) had been isolated the first time from the dichloromethane extract of the stem bark of Garcinia griffithii, together with 1,7-dihydroxyxanthone (2) and polyisoprenylated benzophenone, guttiferone I (3). The structure of these compounds were determined on the basis of spectroscopic data including UV, IR,  1H NMR, 13C NMR, HMQC, HMBC and COSY.   Keywords: diprenylated xanthone, 1,5-dihydroxy-3-methoxy-4,7-diprenylxanthone, Garcinia griffithii

scholarly journals Structure Elucidation of an Pentacyclic Triterpenoid and Phenolic from Steam Bark of Vitex Pubescens Vahl

2019 ◽  
Vol 1 (1) ◽  
pp. 68-74
Author(s):  
Lenny Anwar
Keyword(s):  
1H Nmr ◽  
13C Nmr ◽  
Betulinic Acid ◽  
Spectroscopic Data ◽  
Structure Elucidation ◽  
Stem Bark ◽  
Hydroxybenzoic Acid ◽  
Pentacyclic Triterpenoid ◽  
Reported Data ◽  
First Time

Pentacyclic triterpenoid, betulinic acid (1) and phenolic, p-hydroxybenzoic acid (2), had been isolated for the first time from the stem bark of Vitex pubescens Vahl. The structure of compounds 1 and 2 was determined based on the interpretation of spectroscopic data including UV, IR, NMR (1H-NMR, 13C-NMR, HMQC, HMBC, COSY) and MS, as well as by comparison with those reported data.

scholarly journals Dua Dimer Resveratrol dari Kulit Batang Shorea parvifolia (dipterocarpaceae)

2012 ◽  
Vol 12 (2) ◽  
pp. 163
Author(s):  
Kholifatu Rosyidah ◽  
Lia Dewi Juliawati ◽  
Yana Maolana Syah ◽  
Euis Holishotan Hakim ◽  
Sjamsul Arifin Achmad ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
1H Nmr ◽  
13C Nmr ◽  
Spectroscopic Data ◽  
Ultra Violet ◽  
Stem Bark ◽  
Infra Red ◽  
Reported Data ◽  
Nuclear Magnetic

Two resveratrol dimers, (-)-ampelopsin F dan (-)-laevifonol were isolated from aceton extract of the stem bark ofShorea parvifolia. The structures of these compounds were determined based on their spectroscopic data includingspectroscopy ultra violet (UV), infra red (IR), nuclear magnetic resonance (1H-NMR, 13C-NMR) and also were comparedto the reported data.

scholarly journals ISOLATION AND STRUCTURE ELUCIDATION OF THREE FLAVONOIDS FROM THE SEED OF ZIZIPHUS MAURITIANA LAM

2018 ◽  
Vol 54 (2C) ◽  
pp. 409
Author(s):  
Vũ Thị Thanh Loan
Keyword(s):  
1H Nmr ◽  
13C Nmr ◽  
Spectroscopic Data ◽  
Structure Elucidation ◽  
Ziziphus Mauritiana ◽  
Esi Ms ◽  
Etoh Extract ◽  
First Time

Three flavonoids, spinosin (1), 6′′′-feruloyl spinosin (2) and 6′′′-sinapoyl spinosin (3) wereisolated from EtOH extract of seed of Ziziphus mauritiana. Their structures were elucidated bythe analysis of their spectroscopic data (ESI-MS,1H-NMR,13C-NMR, DEPT, HSQC và HMBC)and compared with literatures. These compounds were isolated for the first time in Vietnamfrom the seed of Ziziphus mauritiana

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 A NEW PRENYLATED FLAVANONE FROM THE ARIAL PART OF Orthosiphon stamineus

2010 ◽  
Vol 8 (1) ◽  
pp. 101-103 ◽  
Author(s):  
M. Amzad Hossain ◽  
Atiqur Rahman ◽  
Sun Chul Kang
Keyword(s):  
1H Nmr ◽  
13C Nmr ◽  
Analytical Methods ◽  
Chloroform Extract ◽  
Orthosiphon Stamineus ◽  
First Time

Phytochemical investigations on the chloroform extract of the arial part of Orthosiphon stamineus resulted in isolation of one new prenylated compound 5,7-dimethoxy-3,4′-dihydroxy-3′,8-di-C-prenylflavanone together with four known flavonoids compounds, sinensetin, eupatorin, 5,6,7,4¢-tetramethoxyflavone and 3-hydroxy-5,6,7,4¢-tetramethoxyflavone. The structures were deduced on basis of different analytical methods such as UV, IR, 1H-NMR, 13C-NMR, DEPT, COSY, HMBQ and GC-MS. The prenylated compound is reported for the first time from this plant.   Keywords: Orthosiphon stamineus, prenylated flavanone, flavonoids

scholarly journals Chemical Constituents of the Insecticidal Active Extract of Tinospora crispa

2019 ◽  
Vol 10 (1) ◽  
pp. 23
Author(s):  
Nor Aziyah Bakhari ◽  
Siti Nur Amirah Diana Fadzillah ◽  
Norain Isa
Keyword(s):  
Blood Pressure ◽  
Petroleum Ether ◽  
Silica Gel ◽  
1H Nmr ◽  
Column Chromatography ◽  
Mobile Phase ◽  
Spectroscopic Data ◽  
Chemical Constituents ◽  
Ethanol Extract ◽  
First Time

Tinospora crispa Miers (Menispermaceae) is a climbing vine with stems rich in warts. The plant is called Akar Seruntum or Patawali in Malaysia and is widely used for treating skin complaints, malaria, bacterial abscess, high blood pressure and diabetes. In the present study, the stems of T. crispa were collected from the locality and succesively extracted with petroleum ether, followed by chloroform and ethanol. The insecticidal active extract (ethanol extract) was  subjected to column chromatography of silica gel eluted with a gradient mobile phase containing hexane, chloroform and ethanol. Among the chemical constituents isolated are n-tetracosyl trans-ferulate and n-octacosyl alcohol, along with three known aporphine alkaloids; N-formylnornuciferine, N-acetylnornuciferine and lysicamine. All compounds were identified by comparing their spectroscopic data (UV, IR, 1H NMR, MS) with data from corresponding values in the literature. Isolation of n-tetracosyl trans-ferulate and n-octacosyl alcohol is reported the first time for T. crispa.

scholarly journals THE PORIFERASTA COMPOUND-5,22E,25-TRIEN-3-Oβ FROM Clerodendrum paniculatum LEAF AS INDUCER AGENT OF SYSTEMIC RESISTANCE ON RED CHILLI PLANT Capsicum annuum L FROM CUCUMBER MOSAIC VIRUS (CMV

2010 ◽  
Vol 9 (3) ◽  
pp. 487-490
Author(s):  
Weny Musa ◽  
Hersanti Hersanti ◽  
Achmad Zainuddin ◽  
Roekmi-ati Tjokronegoro
Keyword(s):  
Cucumber Mosaic Virus ◽  
Mosaic Virus ◽  
Capsicum Annuum ◽  
1H Nmr ◽  
13C Nmr ◽  
Spectroscopic Data ◽  
2D Nmr ◽  
Systemic Resistance ◽  
Inhibition Activity ◽  
Chilli Plant

The poriferasta-5.22E.25-trien-3β-ol compound of leaves of this plant Clerodendrum paniculatum has activity as an inducer agent of plant systemic resistance of red plant toward Cucumber Mosaic Viruses (CMV), the inhibition activity compound shows 82% inhibition activity at 300 ppm. The structure of these compound were determined on the basis of spectroscopic data including UV, IR, 1H-NMR, 13C-NMR and 2D-NMR   Keywords: Poriferasta-5.22E.25-trien-3β-ol, Clerodendrum paniculatum, induction of systemic resistance, CMV

scholarly journals SYNTHESIS AND BIOLOGICAL ACTIVITIES EVALUATION OF SOME NEW SPIRO 1,2,4-TRIAZOLE DERIVATIVES HAVING SULFONAMIDE MOIETY

2015 ◽  
Vol 23 (23) ◽  
pp. 49-59
Author(s):  
Hany M. Dalloul ◽  
Khaled El-nwairy ◽  
Ali Z. Shorafa ◽  
Ahmed Abu Samaha
Keyword(s):  
1H Nmr ◽  
Elemental Analysis ◽  
13C Nmr ◽  
Sulfonic Acid ◽  
Spectroscopic Data ◽  
Biological Activities ◽  
Cyclic Ketones ◽  
Triazole Derivatives ◽  
Toluene Sulfonic Acid

A series of new spiro 1,2,4-triazoles V-IXa-j were synthesized by the reaction of appropriate amidrazones IV with cyclic ketones in the presence of p-toluene sulfonic acid as a catalyst. The structures of the synthesized compounds have been confirmed by the elemental analysis and spectroscopic data (IR, 1H NMR, 13C NMR and MS). The microbial features of the synthesized compounds were studied using well-established methods from the literature.

scholarly journals Antialactone: A New γ-Lactone from Antiaris Africana, and its Absolute Configuration Determined from TDDFT CD Calculations

2008 ◽  
Vol 3 (2) ◽  
pp. 1934578X0800300 ◽  
Author(s):  
Vouffo Bertin ◽  
Hidayat Hussain ◽  
Simeon F. Kouam ◽  
Etienne Dongo ◽  
Gennaro Pescitelli ◽  
...  
Keyword(s):  
Natural Product ◽  
Absolute Configuration ◽  
Betulinic Acid ◽  
Spectroscopic Data ◽  
Nmr Spectra ◽  
2D Nmr ◽  
Stem Bark ◽  
Cd Spectra ◽  
2D Nmr Spectra ◽  
First Time

Four compounds were isolated from the stem bark of Antiaris africana. One of them, a γ-lactone named antialactone (1a), is reported for the first time as a natural product. The structures were determined by comprehensive analyses of their 1D and 2D NMR spectra and EI MS data. The absolute configuration of antialactone acetate (1b) was established by TDDFT CD calculations and comparison with measured CD spectra. The remaining three known compounds were identified, by comparing their spectroscopic data with those reported in the literature, as lichenxanthone, β-sitosterol, and betulinic acid.

Two New Chalcone Glycoside Compounds from Viburnum lantana (Family Caprifoliaceae) and Antioxidant Activity of its Hydroalcoholic Extract

2019 ◽  
Vol 16 (2) ◽  
pp. 93-98
Author(s):  
Ali Shafaghat ◽  
Mohammad Shafaghatlonbar
Keyword(s):  
Antioxidant Activity ◽  
Ir Spectra ◽  
1H Nmr ◽  
13C Nmr ◽  
Natural Antioxidants ◽  
2D Nmr ◽  
Antioxidant Property ◽  
Hydroalcoholic Extract ◽  
First Time

In the present study, two novel chalcone glycosides, trans-3-ethoxy-4-O-(glucopyranoside) -2', 3', 4', 5', 6' -pentahydroxy chalcone (compound 1) and trans-3-methoxy-4-O-(glucopyranoside) -2', 3', 4', 5', 6' -pentahydroxy chalcone (compound 2) have been isolated from the leaves of Viburnum lantana L. The structures were elucidated by using 1H-NMR, 13C-NMR, 2D-NMR such as HMQC, HMBC and NOE experiments and UV-Vis, MS and IR spectra. The antioxidant property of hydroalcoholic extract was evaluated by DPPH style. The results revealed that the leave extract possesses significant antioxidant activity (IC50 = 52 µg/mL). This study indicates that hydroalcoholic extract of the leaves from this species is an important source of chalcone and flavonoid derivatives, as well as of useful natural antioxidants. These chalcone glycoside compounds were isolated for the first time from V. lantana leaves.

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