scholarly journals STRUCTURE IDENTIFICATION OF A TRIMER STILBENOID COMPOUND FROM STEM BARK Hopea nigra (DIPTEROCARPACEAE)

2010 ◽  
Vol 5 (3) ◽  
pp. 211-214
Author(s):  
Sri Atun ◽  
Nurfina Aznama ◽  
Retno Arianingrum ◽  
Masatake Niwab
Keyword(s):  
13C Nmr ◽  
Spectroscopic Data ◽  
Stem Bark ◽  
Structure Identification ◽  
1H And 13C Nmr

Bioactivity as antihephatotoxic directed fractionation of aceton extract from the stem bark of Hopea nigra (Dipterocarpaceae) afforded a stilbenoid trimer, namely vaticanol G (1). The structure of this compound were elucidated based on physical and spectroscopic data (UV, IR, MS, 1H and 13C NMR 1D and 2D). Keywords: Vaticanol G; Hopea nigra; antihepatotoxic; Dipterocarpaceae.

scholarly journals BALANOCARPOL AND HEIMIOL A, TWO RESVERATROLS DIMER FROM STEM BARK Hopea mengarawan (Dipterocarpaceae)

2010 ◽  
Vol 6 (1) ◽  
pp. 75-78 ◽  
Author(s):  
Sri Atun ◽  
Nurfina Aznam ◽  
Retno Arianingrum ◽  
Masatake Niwa
Keyword(s):  
13C Nmr ◽  
Spectroscopic Data ◽  
Structure Elucidation ◽  
Chromatographic Method ◽  
Stem Bark ◽  
1H And 13C Nmr

Isolation and structure elucidation of two resveratrols dimer, namely balanocarpol (1) and heimiol A (2) from stem bark of Hopea mengarawan had been done. The isolation of those compounds was carried out by chromatographic method and structure elucidation was performed by interpretation of spectroscopic data, including UV, IR,  1H and 13C NMR 1D and 2D, and FABMS.   Keywords: Balanocarpol; Heimiol A; Dipterocarpaceae

scholarly journals BALANOCARPOL AND AMPELOPSIN H, TWO OLIGORESVERATROLS FROM STEM BARK OF Hopea odorata (DIPTEROCARPACEAE)

2010 ◽  
Vol 6 (3) ◽  
pp. 307-311
Author(s):  
Sri Atun ◽  
Nurfina Aznam ◽  
Retno Arianingrum ◽  
Masatake Niwa
Keyword(s):  
Vitamin C ◽  
13C Nmr ◽  
Spectroscopic Data ◽  
Natural Antioxidants ◽  
Stem Bark ◽  
1H And 13C Nmr ◽  
Potential Sources ◽  
Deoxyribose Degradation ◽  
Hopea Odorata ◽  
Low Activity

Two oligoresveratrol, namely balanocarpol (2) and ampelopsin H (3) had been isolated from the steam bark of Hopea odorata (Dipterocarpaceae). The structures of these compounds were elucidated based on physical and spectroscopic data (MS, 1H and 13C NMR 1D and 2D). The activity of these compounds was evaluated against the 2-deoxyribose degradation induced by the hydroxyl radical generated via a Fenton-type reaction. The result showed that activity each compounds as radical hydroxyl scavenger of balanocarpol, and ampelopsin H with an IC50 1802.3 and 4840.0 μg/mL, respectively. Each compound showed low activity. Vitamin C (IC50 83.9 μg/mL) and butylated hydroxyl toluene (1328.0 μg/mL) were used as positif controls. These results suggest that oligoresveratrols from stem bark of H. odorata may be useful as potential sources of natural antioxidants.   Keywords: balanocarpol, ampelopsin H, antioxidant, Dipterocarpaceae

scholarly journals HOPEAPHENOL-O-GLYCOSIDE, A COMPOUND ISOLATED FROM STEM BARK Anisoptera marginata (Dipterocarpaceae)

2010 ◽  
Vol 9 (1) ◽  
pp. 151-157
Author(s):  
Sri Atun
Keyword(s):  
13C Nmr ◽  
Spectroscopic Data ◽  
Structure Elucidation ◽  
Stem Bark ◽  
Acetone Extract ◽  
1H And 13C Nmr

Isolation and structure elucidation of some compounds from stem bark of Anisoptera marginata had been done. The isolation of those compounds was carried out by chromatographyc method and structure elucidation was performed by interpretation of spectroscopic data, including UV, IR,  1H and 13C NMR 1D and 2D, and FABMS. From acetone extract stem bark A. marginata we isolated five known compounds namely bergenin (1), (-)-ε-vinipherin (2), (-)-ampelopsin A (3), vaticanol B (4), (-)-hopeaphenol (5), and a glycoside compound namely hopeaphenol-O- glycoside (6).   Keywords: Dipterocarpaceae; Anisoptera marginata; hopeaphenol-O-glucoside

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 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

ChemInform Abstract: Determination of the Structure of 1-Vinylbenzazoles by 1H- and 13C-NMR Spectroscopic Data.

ChemInform ◽  
1988 ◽  
Vol 19 (43) ◽  
Author(s):  
A. V. AFONIN ◽  
L. A. ES'KOVA ◽  
V. K. VORONOV ◽  
E. S. DOMNINA ◽  
L. V. BAIKALOVA ◽  
...  
Keyword(s):  
13C Nmr ◽  
Spectroscopic Data ◽  
1H And 13C Nmr

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 Triterpenoids from Euphorbia maculata and Their Anti-Inflammatory Effects

Molecules ◽  
2018 ◽  
Vol 23 (9) ◽  
pp. 2112 ◽  
Author(s):  
Yi Sun ◽  
Liang-liang Gao ◽  
Meng-yue Tang ◽  
Bao-min Feng ◽  
Yue-hu Pei ◽  
...  
Keyword(s):  
Medicinal Plant ◽  
13C Nmr ◽  
Spectroscopic Data ◽  
2D Nmr ◽  
Nmr Analysis ◽  
Chemopreventive Agents ◽  
1H And 13C Nmr ◽  
Anti Inflammatory ◽  
New Compounds

Euphorbia maculata is a medicinal plant of the Euphorbiaceae family, which can produce anti-inflammatory and cancer chemopreventive agents of triterpenoids. The present study reports on the bioactive triterpenoids of this plant. Two new lanostane-type triterpenoids, named (3S,4S,7S,9R)-4-methyl-3,7-dihydroxy-7(8→9) abeo-lanost-24(28)-en-8-one (1) and 24-hydroperoxylanost-7,25-dien-3β-ol (2), together with 15 known triterpene derivatives, were isolated from Euphorbia maculata. The structures of the new compounds were determined on the basis of extensive spectroscopic data (UV, MS, 1H and 13C-NMR, and 2D NMR) analysis. All tetracyclic triterpenoids (1–11) were evaluated for their anti-inflammatory effects in the test of TPA-induced inflammation (1 μg/ear) in mice. The triterpenes exhibited significant anti-inflammatory activities.

scholarly journals Pyrrolizidine alkaloids from seven wild-growing Senecio species in Serbia and Montenegro

2009 ◽  
Vol 74 (1) ◽  
pp. 27-34 ◽  
Author(s):  
Boris Mandic ◽  
Dejan Godjevac ◽  
Vladimir Beskoski ◽  
Milena Simic ◽  
Snezana Trifunovic ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
13C Nmr ◽  
Spectroscopic Data ◽  
Pyrrolizidine Alkaloids ◽  
1H And 13C Nmr ◽  
Serbia And Montenegro ◽  
The World ◽  
The Rich ◽  
Animal Exposure ◽  
First Time

The genus Senecio (family Asteraceae) is one of the largest in the world. It comprises about 1100 species which are the rich source of pyrrolizidine alkaloids. Plants containing pyrrolizidine alkaloids are among the most important sources of human and animal exposure to plant toxins and carcinogens. The pyrrolizidine alkaloids of seven Senecio species (S. erucifolius, S. othonnae, S. wagneri, S. subalpinus, S. carpathicus, S. paludosus and S. rupestris) were studied. Fourteen alkaloids were isolated and their structures determined from spectroscopic data (1H- and 13C-NMR, IR and MS). Five of them were identified in S. erucifolius, four in S. othonnae, two in S. wagneri, four in S. subalpinus, two in S. carpathicus, three in S. paludosus and three in S. rupestris. Seven pyrrolizidine alkaloids were found for the first time in particular species. The results have chemotaxonomic importance. The cytotoxic activity and antimicrobial activity of some alkaloids were also studied.

scholarly journals BIFLAVONOID COMPOUND FROM THE STEM BARK OF GAMBOGE (Garcinia xanthochymus)

2011 ◽  
Vol 11 (2) ◽  
pp. 169-173 ◽  
Author(s):  
Muharni Muharni ◽  
Elfita Elfita ◽  
Amanda Amanda
Keyword(s):  
Medicinal Plant ◽  
Traditional Medicine ◽  
13C Nmr ◽  
Spectroscopic Data ◽  
Methanol Extract ◽  
Stem Bark ◽  
The North ◽  
Garcinia Xanthochymus ◽  
Reported Data ◽  
Food Toxin

Garcinia xanthochymus (Guttiferae) commonly known as gamboge, is a perennial medicinal plant native to the north of Thailand and Myanmar. Gamboge is used in watercolors, as a yellow fabric dye and traditional medicine for treating diarrhea and dysentery, dispelling worms clearing away fire and removing food toxin. Phytochemical investigations on the methanol extract of the stem bark of Garcinia xanthochymus resulted in isolation of one biflavonoid compound (+)-morelloflavon. The structure of this compound was deduced on basis of spectroscopic data including 1H NMR, 13C NMR, HMQC and HMBC and comparison with the reported data. This compound has been reported from others species of Garcinia.

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