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 Phytochemical studies on the aerial parts of Sarcococca hookeriana (Baillon) of Nepalese origin

1970 ◽  
Vol 21 ◽  
pp. 8-15
Author(s):  
Narayan P. Rai ◽  
Bimala Lama ◽  
Shiva P. Subedi ◽  
W. C. Taylor ◽  
M. D. Manandhar
Keyword(s):  
Spectral Analysis ◽  
Oleanolic Acid ◽  
1H Nmr ◽  
13C Nmr ◽  
Chemical Society ◽  
Chloroform Extract ◽  
Hmbc Spectrum ◽  
Aerial Parts ◽  
Phytochemical Studies ◽  
First Time

Two known pregnane type of alkaloids, axillaridine A and spiropachysine, and an unidentified pregane alkaloid along with oleanolic acid and stigmasteryl glucoside have been isolated from chloroform extract of the aerial parts of Sarcococca hookeriana. The structures of the alkaloids are established on the basis of spectral analysis of 1H-NMR, 13C-NMR, HMQC, COSY and HMBC spectrum. All compounds were isolated for the first time from S. hookeriana. So far, species of Sarcococca was not reported to contain spiropachysine which was initially reported as a novel alkaloid from Pachysandra terminalis SIEB. et ZUCC.(Buxaceae).DOI: 10.3126/jncs.v21i0.215Journal of Nepal Chemical Society Vol.21 2006 pp.8-15

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

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.

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

scholarly journals Sesqui- and triterpenoids from the pericarp of Lansium domesticum

2019 ◽  
Vol 2 (1) ◽  
pp. 47-52
Author(s):  
Nguyen Thi Thao Ly ◽  
Bui Ngoc Dung ◽  
Cao Thi Kieu Trang ◽  
Nguyen Thi Le Thu
Keyword(s):  
Petroleum Ether ◽  
1H Nmr ◽  
13C Nmr ◽  
Petroleum Ether Extract ◽  
Ether Extract ◽  
First Time ◽  
Lansium Domesticum

Four compounds were isolated from a petroleum ether extract of the pericarp of Lansium domesticum collected in Quang Nam Province. Their structures were determined using NMR (1H NMR, 13C NMR, HSQC, HMBC, and COSY) techniques. The compounds were two sesquiterpenoids, 6α,9β-dihydroxyeudesma-4(15)- ene and aphanamol II, along with two onocerane triterpenoids, 3β-hydroxyonocera-8(26),14-diene- 21-one and ,β-onoceradienedione. This is the first time that 6α,9β-dihydroxyeudesma-4(15)-ene has been found in nature.

scholarly journals THE TRITERPENOID AND STEROID FROM THE FRUITING BODY OF Ganoderma applanatum (Pers.) Pat. IN VIETNAM

2018 ◽  
Vol 56 (5) ◽  
Author(s):  
Thang Dinh Tran
Keyword(s):  
1H Nmr ◽  
13C Nmr ◽  
Fruiting Body ◽  
Spectroscopic Methods ◽  
Ganoderma Applanatum ◽  
First Time

Five compounds, ergosterol (1), 5α,8α-epidioxy-22E-ergosta-6,22-dien-3β-ol (2); ergosta-7,22-dien-3β-ol (3); lanosta-7,9(11),24-triene-3,26-diol (4) and 3β-hydroxy-5α-lanosta-7,9,24(E)-trien-26-oic acid (5) were isolated from fruiting body of Ganoderma applanatum (Pers.) Pat.  (Ganodermataceae). The structures of the isolated compounds were established by spectroscopic methods (UV, IR, MS, 1H-NMR, 13C-NMR, DEPT, COSY, HSQC and HMBC). These compounds were isolated from the Vietnamese fungi for the first time. Moreover, the lanosta-7,9(11),24-triene-3,26-diol is the first compound was found in the fungi.

scholarly journals On the occurrence of sonchuside A in Cicerbita alpina and its chemosystematic significance

2005 ◽  
Vol 70 (2) ◽  
pp. 171-175 ◽  
Author(s):  
Christian Zidorn ◽  
Ritae Schwaha ◽  
Ernst Ellmerer ◽  
Hermann Stuppner
Keyword(s):  
1H Nmr ◽  
13C Nmr ◽  
Nmr Data ◽  
First Time ◽  
Cicerbita Alpina

The subaerial parts of Cicerbita alpina yielded the guaianolide 8-acetyl- 15?-D-glucopyranosyllactucin (1) and the germacranolide Sonchuside A (2). The sonchuside A is reported for the first time from the genus Cicerbita. 1H-NMR and 13C NMR data of compounds 1 and 2 measured in deuterodimethyl sulfoxide and deuteromethanol, respectively, are given and the chemosystematic implications of the occurrence of sonchuside A in C. alpina are discussed briefly.

scholarly journals New isoquinoline alkaloid from Carduus crispus L.

2014 ◽  
Vol 12 ◽  
pp. 85-87
Author(s):  
J Tunsag ◽  
G Davaakhuu ◽  
D Batsuren
Keyword(s):  
1H Nmr ◽  
Bioactive Compounds ◽  
13C Nmr ◽  
Ethanol Extract ◽  
Isoquinoline Alkaloid ◽  
Spectroscopic Methods ◽  
Aerial Parts ◽  
Isolated Compound ◽  
First Time

A new isoquinoline alkaloid, along with other known 4 bioactive compounds (1 isoquinoline alkaloid, 2 flavonoids, 1 coumarin), were isolated from the ethanol extract of aerial parts of Carduus crispus L. Crispine А N-oxide was newly isolated compound, two of them (quercetin and rutin) were compounds isolated for the first time from indicated plant. The structures of these compounds were elucidated and confirmed with spectroscopic methods e.g. 1H-NMR, 13C-NMR, EI-MS, COSY, HSQC, HMBC, and by comparison with literature data.DOI: http://dx.doi.org/10.5564/mjc.v12i0.178 Mongolian Journal of Chemistry Vol.12 2011: 85-87

scholarly journals PHYTOCHEMICAL STUDIES OF THE PETROLEUM ETHER EXTRACT OF THE LEAVES OF Lagerstroemia speciosa Linn

2010 ◽  
Vol 9 (3) ◽  
pp. 500-504
Author(s):  
S.M. Mizanur Rahman ◽  
Shayla Pervin ◽  
Md. Abdul Quader ◽  
M. Amzad Hossain
Keyword(s):  
Petroleum Ether ◽  
1H Nmr ◽  
13C Nmr ◽  
Mass Spectra ◽  
Petroleum Ether Extract ◽  
Ether Extract ◽  
Lagerstroemia Speciosa ◽  
New Compounds ◽  
Phytochemical Studies ◽  
First Time

Two new compounds, normal alcohol containing of higher carbons and isomer of β-sitosterol were isolated for the first time from the petroleum extract of the leaves of Lagerstroemia speciosa. The structure of the compound has been established on the basis of UV, IR, 1H-NMR, 13C-NMR and mass spectra and identified as nonanol and isomer of β-sitosterol.   Keywords: Lagerstroemia speciosa, petroleum ether extracts, isolation, 1-nonanol, 2 β-sitostero, spectral analyses.

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