scholarly journals Integrated Analysis of the Bark Oil from Cinnamosma madagascariensis by GC(RI), GC-MS and NMR. 13C NMR data of Cyclocopacamphene and Cyclosativene

2017 ◽  
Vol 12 (2) ◽  
pp. 1934578X1701200
Author(s):  
Gabriel Garcia ◽  
Delphin Rabehaja ◽  
Julie-Marie Charmillon ◽  
Panja Ramanoelina ◽  
Joseph Casanova ◽  
...  
Keyword(s):  
13C Nmr ◽  
Integrated Analysis ◽  
Nmr Data ◽  
Leaf Oil ◽  
First Time ◽  
C Nmr

The composition of leaf and bark oils of Cinnamosma madagascariensis has been investigated by a combination of GC (RI), GC-MS and 13C NMR. The leaf oil contained mainly monoterpenes: myrcene (17.9%), limonene (17.8%), β-phellandrene (15.3%) and linalool (12.2%). The bark oil, investigated for the first time, contained β-pinene (49.9%) and α-pinene (19.5%) as major components. Special attention was paid to the identification of cyclocopacamphene, an epimer of cyclosativene. 13C NMR data of both compounds have been provided.

scholarly journals Composition and Chemical Variability of the Leaf Oil from Corsican Juniperus thurifera. Integrated Analysis by GC(RI), GC-MS and 13C NMR

2010 ◽  
Vol 5 (12) ◽  
pp. 1934578X1000501 ◽  
Author(s):  
Josephine Ottavioli ◽  
Joseph Casanova ◽  
Ange Bighelli
Keyword(s):  
13C Nmr ◽  
Main Group ◽  
Integrated Analysis ◽  
Pca Analysis ◽  
Juniperus Thurifera ◽  
Group 14 ◽  
Chemical Variability ◽  
Leaf Oil ◽  
Definition Of ◽  
C Nmr

The composition of 16 samples of leaf oil from Corsican Juniperus thurifera was investigated by integrated techniques, GC, GC-MS and 13C NMR. K-means partitioning and PCA analysis of the data allowed the definition of a main group (14 samples) dominated by limonene (mean = 52.2%, SD = 6.4) and α-pinene (mean = 7.2%, SD = 3.8). Limonene and β-elemol (up to 19.7%) were identified as the major components of two atypic samples.

scholarly journals Structural Investigations of C-Nitrosobenzenes. Part 3.1 Solid-state and Solution 13C NMR Studies, and Crystal Structure of E-(4-CIC6H4NO)2

1999 ◽  
Vol 23 (3) ◽  
pp. 202-203
Author(s):  
Daniel A. Fletcher ◽  
Brian G. Gowenlock ◽  
Keith G. Orrell ◽  
David C. Apperley ◽  
Michael B. Hursthouse ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
13C Nmr ◽  
Nmr Studies ◽  
Structural Investigations ◽  
Nmr Data ◽  
C Nmr

Solid-state and solution 13C NMR data for the monomers and dimers of 3- and 4-substituted nitrosobenzenes, and the crystal structure of E-(4-CIC6H4NO)2 are reported.

scholarly journals The NMR Spin Systems of Scutellaria 8β,13-Epoxy-neo-clerod-3-en-15,16-olides and Revision of 1H and 13C NMR Spectra Reported Data

2020 ◽  
Vol 15 (10) ◽  
pp. 1934578X2093378
Author(s):  
Josep Coll Toledano
Keyword(s):  
13C Nmr ◽  
Nmr Spectra ◽  
Spin Systems ◽  
13C Nmr Spectra ◽  
1H And 13C Nmr ◽  
Nmr Data ◽  
Reported Data ◽  
New Compounds ◽  
C Nmr ◽  
Shielding Effects

The present review of NMR spectroscopic structural elucidation data of new compounds isolated from Scutellaria species is focused on the title compounds, displaying a peculiar 13-spiro feature. It contains a compilation of 1H and 13C NMR data of these diterpenoids grouped by similar substitution patterns. Comparing shielding effects pointed out not only the identity of some compounds (already reported) but also potential misassignments and convenient revisions to get unambiguous structural proposals.

Isolation of Bioactive Compounds from Aspergillus terreus

2004 ◽  
Vol 59 (3) ◽  
pp. 324-328 ◽  
Author(s):  
Muhammad I. Choudhary ◽  
Syed G. Musharraf ◽  
Talat Mukhmoor ◽  
Farzana Shaheen ◽  
Shamsher Ali ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
13C Nmr ◽  
Culture Medium ◽  
Aspergillus Terreus ◽  
Ethyl Acetate Extract ◽  
Microsporum Canis ◽  
Spectroscopic Techniques ◽  
Significant Activity ◽  
Nmr Data ◽  
First Time

A new metabolite, 6-(4’-hydroxy-2’-methyl phenoxy)-(-)-(3R)-mellein (1) was isolated from the ethyl acetate extract of Aspergillus terreus culture medium along with three known isocoumarin derivatives, (-)-(3R)-6-methoxymellein (2), (-)-(3R)-6,7-dimethoxymellein (Kigelin) (3) and (3R, 4R)-6,7-dimethoxy-4-hydroxymellein (4). Metabolites 1 and 4 showed significant activity against human pathogenic dermatophytes, Microsporum canis and Trichophyton longifusus. Metabolite 1 also exhibited potent antioxidant activity. The structures of metabolites were characterized on the basis of spectroscopic techniques. 13C NMR data of metabolites 2 - 4 are also being reported for the first time

Inhaltsstoffe aus Pseudocalymma elegans (Vell.) Kuhlm. 2. Isolierung eines neuen Iridoidglucosids und von Durantosid II / Ingredients from Pseudocalymma elegans (Vell.) Kuhlm. 2. Isolation of a New Iridoid Glucoside and of Durantoside II

1991 ◽  
Vol 46 (9) ◽  
pp. 1258-1260 ◽  
Author(s):  
Hans Chr. Krebs
Keyword(s):  
Methanolic Extract ◽  
Iridoid Glucoside ◽  
Nmr Data ◽  
First Time ◽  
C Nmr

A new iridoid glucoside, pseudocalymmoside, has been isolated besides lamiide and durantoside II from the methanolic extract of the poisonous brazilian plant Pseudocalymma elegans. 13C NMR data of durantoside II are reported for the first time.

scholarly journals Clerodane Diterpenes from Croton Species: Distribution and a Compilation of their 13C NMR Spectral Data

2006 ◽  
Vol 1 (4) ◽  
pp. 1934578X0600100 ◽  
Author(s):  
Sebastião F. Palmeira Jünior ◽  
Lucia M. Conserva ◽  
José Maria Barbosa Filho
Keyword(s):  
Spectral Data ◽  
Species Distribution ◽  
13C Nmr ◽  
Biological Activities ◽  
Review Of The Literature ◽  
Nmr Data ◽  
Clerodane Diterpenes ◽  
C Nmr

The present work is a review of the literature of clerodane diterpenes from Croton species. It contains a compilation of 13C NMR data of 83 of these diterpenoids and their biological activities. This review covers a period from 1969 to October 2005 and 224 references are cited.

Oleanane Glycosides from Eclipta prostrata

1970 ◽  
Vol 4 (2) ◽  
Author(s):  
Mohammad S Rahman ◽  
Rasheduzzaman Chowdhury ◽  
Chodhury M Hasan ◽  
Mohammad A Rashid
Keyword(s):  
Key Words ◽  
13C Nmr ◽  
Full Text ◽  
High Field ◽  
Stem Bark ◽  
Spectroscopic Studies ◽  
Hexane Extract ◽  
Nmr Data ◽  
Eclipta Prostrata ◽  
First Time

Two oleanane-type glycosides eclalbasaponin II (1) and eclalbasaponin I (2) along with the ubiquitous steroid, stigmasterol were isolated from an n-hexane extract of the stem bark of Eclipta prostrata. The structures of the isolated compounds were confirmed by extensive spectroscopic studies, notably high field NMR and MS. The 13C NMR data of the parent saponins 1 and 2 are reported here for the first time. Key words: Eclipta prostrata, Compositae, Oleanane glycoside, Eclalbasaponin I, Eclalbasaponin II. Dhaka Univ. J. Pharm. Sci. Vol.4(2) 2005 The full text is of this article is available at the Dhaka Univ. J. Pharm. Sci. website

13C-NMR chemische Verschiebung phenylsubstituierter polycyclischer Kohlenwasserstoffe / 13C-NMR Chemical Shift of Phenylsubstituted Polycyclic Hydrocarbons

1979 ◽  
Vol 34 (11) ◽  
pp. 1334-1343 ◽  
Author(s):  
W. Storek ◽  
J. Sauer ◽  
R. Stößer
Keyword(s):  
Chemical Shift ◽  
13C Nmr ◽  
Nmr Spectra ◽  
Ring Current ◽  
Current Effect ◽  
Nmr Data ◽  
Ring Current Effect ◽  
Anisotropic Contribution ◽  
Chemische Verschiebung ◽  
C Nmr

13C-NMR spectra of tetracene, rubrene, 1,3,5-tri-, penta-, and hexaphenylbenzene are reported. The discussion also includes the already known 13C-NMR data for diphenyl, 9,10-diphenyl-, 9,10-dibenzyl-, and 9,10-dimethyl-anthracene [1] as well as toluene. On the basis of CNDO/2 calculations different influences (diamagnetic and paramagnetic term, anisotropic contribution, ring current effect, geometry) on the chemical shift are analyzed for diphenyl and within the row benzene through tetracene

scholarly journals Oleanane-type Triterpene Glycosides from Glycyrrhiza Uralensis

2007 ◽  
Vol 2 (3) ◽  
pp. 1934578X0700200 ◽  
Author(s):  
Jinwei Li-Yang ◽  
Jun-ichiro Nakajima ◽  
Nobuhito Kimura ◽  
Kazuki Saito ◽  
Shujiro Seo
Keyword(s):  
Natural Products ◽  
Spectroscopic Data ◽  
2D Nmr ◽  
Mass Spectrometric ◽  
Triterpene Glycosides ◽  
Glycyrrhiza Uralensis ◽  
Nmr Data ◽  
Nmr Methods ◽  
First Time ◽  
C Nmr

Chemical investigation of the roots of Glycyrrhiza uralensis resulted in the isolation of six oleanane-type triterpene glycosides (1 – 6), including one new saponin (1) and two (2 and 3) obtained as natural products for the first time. The new licorice saponin (1) was identified as 22β–acetoxylglycyrrhizin from [α]D, mass spectrometric, and UV, IR, and NMR spectroscopic data.. Full assignments of 1H and 13C-NMR data for compounds 2, 3, 4, 5 and 6 were made for the first time according to 2D NMR methods.

scholarly journals Dihydroisocoumarins and Dihydroisoflavones from the Rhizomes of Dioscorea collettii with Cytotoxic Activity and Structural Revision of 2,2′-Oxybis(1,4-di-tert-butylbenzene)

Molecules ◽  
2021 ◽  
Vol 26 (17) ◽  
pp. 5381
Author(s):  
Songsong Jing ◽  
Zhuo Qu ◽  
Chengcheng Zhao ◽  
Xia Li ◽  
Long Guo ◽  
...  
Keyword(s):  
Cytotoxic Activity ◽  
13C Nmr ◽  
The Other ◽  
Cytotoxic Activities ◽  
Spectroscopic Methods ◽  
1H And 13C Nmr ◽  
Structural Revision ◽  
Nmr Data ◽  
H460 Cell ◽  
First Time

The investigation of the constituents of the rhizomes of Dioscorea collettii afforded one new dihydroisocoumarin, named (−)-montroumarin (1a), along with five known compounds—montroumarin (1b), 1,1′-oxybis(2,4-di-tert-butylbenzene) (2), (3R)-3′-O-methylviolanone (3a), (3S)-3′-O-methylviolanone (3b), and (RS)-sativanone (4). Their structures were elucidated using extensive spectroscopic methods. To the best of our knowledge, compound 1a is a new enantiomer of compound 1b. The NMR data of compound 2 had been reported but its structure was erroneous. The structure of compound 2 was revised on the basis of a reinterpretation of its NMR data (1D and 2D) and the assignment of the 1H and 13C NMR data was given rightly for the first time. Compounds 3a–4, three dihydroisoflavones, were reported from the Dioscoreaceae family for the first time. The cytotoxic activities of all the compounds were tested against the NCI-H460 cell line. Two dihydroisocoumarins, compounds 1a and 1b, displayed moderate cytotoxic activities, while the other compounds showed no cytotoxicity.

Sign in / Sign up

Export Citation Format

Share Document