scholarly journals Mulinane and Azorellane Diterpenoid Biomarkers by GC-MS from a Representative Apiaceae (Umbelliferae) Species of the Andes

Molecules ◽  
2019 ◽  
Vol 24 (4) ◽  
pp. 684 ◽  
Author(s):  
Bernd Simoneit ◽  
Daniel Oros ◽  
Rudolf Jaffé ◽  
Alexandra Didyk-Peña ◽  
Carlos Areche ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Mass Spectra ◽  
Molecular Diversity ◽  
Gas Chromatography Mass Spectrometry ◽  
The Novel ◽  
Forensic Chemistry ◽  
The Andes ◽  
Chromatography Mass Spectrometry ◽  
Great Utility

Extracts of bled resin from Azorella compacta, of the Azorelloideae family from the Andes (>4000 m), were analyzed by gas chromatography-mass spectrometry. The mass spectra of the dominant compounds of the resin and its hydrogenation products were documented. The most abundant compounds were oxygenated diterpenoids, namely mulinadien-20-oic (Δ11,13 and Δ11,14) acids, azorell-13-en-20-oic acid, 13α,14β-dihydroxymulin-11-en-20-oic acid, and azorellanol, with a group of azorellenes and mulinadienes. The mass spectra of the novel diterpenoid hydrocarbons with the azorellane and mulinane skeletons were also presented. This study documents the molecular diversity of these diterpenoid classes, and could be of great utility for future organic geochemical, environmental, archeological, pharmaceutical, and forensic chemistry studies.

Identification of Secondary Metabolites from the Ethanol extract of the leaves of Bauhinia tomentosa by GC-MS Analysis

2021 ◽  
pp. 2335-2341
Author(s):  
R. Balabhaskar ◽  
K. Vijayalakshmi
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Secondary Metabolites ◽  
Mass Spectra ◽  
Ethanol Extract ◽  
Alpha Tocopherol ◽  
Gas Chromatography Mass Spectrometry ◽  
Chemical Components ◽  
Chromatography Mass Spectrometry ◽  
Ms Analysis

Gas Chromatography-Mass Spectrometry (GC-MS) is normally used for direct analysis of chemical components existing in herbal medicines. The medicinal plants are having numerous bioactive components which are identified even at less than 1ng by using GC-MS or LC-MS analysis. The aim of this study is to identify the secondary metabolites present in the leaves of B. tomentosa using gas chromatography-mass spectrometry (GC-MS) analysis. In the present study the ethanol extract of the leaves of Bauhinia tomentosa has been subjected to GC-MS analysis, while the mass spectra of the compounds found in the extract was matched with the National Institute of Standards and Technology (NIST) library. GC-MS analysis revealed the presence of 14 secondary metabolites. These compounds were identified by comparing their retention times and peak areas with those from the literature and by interpretation of the mass spectra. The major secondary metabolites were DL-.alpha.-tocopherol (14.84%), 2-[(trimethylsilyl oxy]-, methyl ester, 1-alpha,2-alpha.-epoxy-1-beta-methylcholesta-4,6-dien-3-one (12.93%), pentacosenoic acid (12.71%), phytol (10.28%), Ethyl Isoallocholate (8.197%), Spirost-8-en-11-one-3-hydroxy-,(3-beta,5 alpha,14 beta,20 beta, 22 beta,25R)-(8.162%), Urs-12-en-28-ol (6.675%), 1-Octadecyne (5.702%) and Cholest-8-en-3-beta-ol,Acetate (5.426%). The compounds having area less that 5% were considered of no significance. These findings suggest that the presence of these secondary metabolites may be the cause for the properties exhibited by Bauhinia tomentosa. Thus, presence of various bioactive compounds justifies the use of the leaf for various ailments by traditional practitioners.

Massenspektrometrische Identifizierung der Phenylthiohydantoin-Derivate von Aminosäuren / Identification of Amino Acid Phenylthiohydantoins by Mass Spectrometry

1970 ◽  
Vol 25 (7) ◽  
pp. 681-689 ◽  
Author(s):  
H. Hagenmaier ◽  
W. Ebbighausen ◽  
G. Nicholson ◽  
W. Vötsch
Keyword(s):  
Mass Spectrometry ◽  
Amino Acids ◽  
Gas Chromatography ◽  
Amino Acid ◽  
Mass Spectra ◽  
Gas Chromatography Mass Spectrometry ◽  
Chromatography Mass Spectrometry ◽  
Unequivocal Identification

The unequivocal identification of phenylthiohydantoins of the 20 amino acids usually occurring in proteins is possible by mass spectrometry and by combined gas chromatography-mass spectrometry. The method is sensitive enough to be applied to the identification of phenylthiohydantoins obtained from automated Edman degradations of polypeptides. Mass spectra of 21 amino acid phenylthiohydantoins are presented and interpreted.

Gas Chromatographic and Mass Spectrometric Characterization of Impurities in Technical Methoxychlor

1980 ◽  
Vol 63 (5) ◽  
pp. 1007-1037
Author(s):  
Carolejean H Lamoureux ◽  
Vernon J Feil
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Mass Spectra ◽  
Mass Spectrometric ◽  
Gas Chromatography Mass Spectrometry ◽  
Chromatography Mass Spectrometry

Abstract The impurities in technical methoxychlor were concentrated by removing most of the 1,1,1-trichloro-2,2-bis(4-methoxyphenyl)ethane by recrystallization. Analysis of the impurities by gas chromatography–mass spectrometry provided evidence for more than 50 compounds. Twenty-five of these were identified through interpretation of mass spectra and synthesis.

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