scholarly journals Sterols from Echinopsis oxygona (Link) zucc. ex Pfeiff

2020 ◽  
Vol 32 (9) ◽  
pp. 2135-2138
Author(s):  
RHANNEY L. GONZALES ◽  
CHIEN-CHANG SHEN ◽  
CONSOLACION Y. RAGASA
Keyword(s):  
Fatty Acid ◽  
Sea Urchin ◽  
Chemical Constituents ◽  
The Philippines ◽  
Ornamental Plant ◽  
Fatty Acid Esters ◽  
Anticancer Properties ◽  
Ergosterol Peroxide ◽  
Easter Lily ◽  
Acid Esters

Echinopsis oxygona (Link) zucc. ex Pfeiff, commonly known as easter lily cactus and sea urchin cactus, is grown as an ornamental plant in the Philippines. Chemical investigation of the dichloromethane extracts of E. oxygona has led to the isolation of ostreasterol (1), ostreasteryl fatty acid esters (2) and ergosterol peroxide (3) from the flowers and a mixture of β-sitosterol (4) and stigmasterol (5) in about 2:1 ratio from the stems. Compounds 3-5 were reported to exhibit anticancer properties. This is the first report on the chemical constituents of E. oxygona.

scholarly journals Chemical Constituents of Rheum ribes L.

2017 ◽  
Vol 9 (1) ◽  
Author(s):  
Consolacion Y. Ragasa ◽  
Jariel Naomi B. Bacar ◽  
Maria Margarita R. Querido ◽  
Maria Carmen S. Tan ◽  
Glenn G. Oyong ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Chemical Constituents ◽  
Chemical Investigation ◽  
Fatty Acid Esters ◽  
Nmr Data ◽  
Acid Esters

Chemical investigation of the dichloromethane extract of Rheum ribes has led to the isolation of β-sitosteryl-3β- glucopyranoside-6'-O-fatty acid esters (1), β-sitosterol (2), phytyl fatty acid esters (3), triacylgly c e r o l s (4) and chlorophyllide a (5). The structures of 1-5 were identified by comparison of their NMR data with literature data.

scholarly journals Chemical constituents of Eremomastax speciosa (Hochst.) Cufod leaves and its cytotoxic potential on NIH-3T3 cells

2021 ◽  
Vol 34 (3) ◽  
pp. 633-640
Author(s):  
M. O. Eve ◽  
T. N. Alfred ◽  
I. I. Akripo ◽  
E. E. Ubana ◽  
I. M. Choudhary
Keyword(s):  
Fatty Acid ◽  
Chemical Constituents ◽  
Acid Ethyl Ester ◽  
Fibroblast Cell ◽  
Fatty Acid Esters ◽  
Gas Chromatography Mass Spectrometry ◽  
3T3 Cells ◽  
Nih 3T3 ◽  
Acid Esters ◽  
Nih 3T3 Cells

This study aimed at assessing the cytotoxicity of Eremomastax speciosa crude extract on NIH-3T3 fibroblast cell lines and reporting the chemical constituents in the extract. The MTT assay on NIH-3T3 cells showed a significantly lower (p < 0.05) inhibition from E. speciosa (IC50 > 30 µg/mL) compared to cyclohexamide (IC50 > 0.8 µg/mL). This result validates the non-toxicity observed with the use of E. speciosa on normal cells at low to moderate doses. Four compounds were isolated and identified from their EIMS as well as 1D and 2D NMR spectroscopic data namely hydroxyandrographolide (1), stigmasterol glucoside (2), (Z)-4-coumaric acid 4-O-β-D-apiofuranosyl-(1’’→2’)-O-β-D-glucopyranoside (3) and 5-methoxy-4,4′-di-O-methyl- secolariciresinol-9′-monoacetate (4). These compounds are isolated from this species for the first time. Thirteen volatile constituents were detected in the extract using gas chromatography mass spectrometry (GC-MS). Besides 6,10,14-trimethy-2-pentadecanone (12.63%), mostly fatty acid esters were detected in high amounts notably ethyl hexadecanoate (16.00%), ethyl-9,12,15-octadecatrienoate (11.51%) and 9,12-octadecadienoic acid ethyl ester (8.05%). This study revealed many unsaturated fatty acid esters in E. speciosa and is noteworthy that ω-3 and ω-6 fatty acid esters were predominant, hence an added nutritional value to this plant.                     KEY WORDS: Eremomastax speciosa, Secondary metabolites, NIH-3T3 cytotoxicity, NMR, GC-MS   Bull. Chem. Soc. Ethiop. 2020, 34(3), 633-640. DOI: https://dx.doi.org/10.4314/bcse.v34i3.18

scholarly journals TRITERPENES FROM CERIOPS DECANDRA (GRIFF.) W. THEOB.

2017 ◽  
Vol 10 (11) ◽  
pp. 244
Author(s):  
Judy Perez ◽  
Chien-chang Shen ◽  
Consolacion Y Ragasa
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Literature Search ◽  
Chemical Constituents ◽  
Fatty Acid Esters ◽  
Gel Chromatography ◽  
Anticancer Properties ◽  
Nmr Data ◽  
Ceriops Decandra ◽  
Silica Gel Chromatography ◽  
Acid Esters

  Objective: To isolate and identify the chemical constituents of Ceriops decandra. Methods: The chemical constituents of C. decandra (Griff.) W. Theob. were isolated by silica gel chromatography. The structures of the isolated compounds were identified by nuclear magnetic resonance (NMR) spectroscopy.Results: Chemical investigation of the dichloromethane extracts of the leaves of C. decandra has led to the isolation of 3β-E-coumaroylbetulinic acid (1), lupeol fatty acid esters (2), betulonic acid (3), betulin (4), betulinic acid (5), lupeol (6), lupenone (7), and a mixture of 3β-E-feruloyllupeol (8) and 3β-Z-feruloyllupeol (9), and chlorophyll a (10). The structures of 1-10 were identified by comparison of their NMR data with literature data.Conclusion: To the best of our knowledge, this is the first report on the isolation of 1-3 from C. decandra. Literature search revealed that the triterpenes isolated from C. decandra exhibited anticancer properties.

Development of the determination methods of fatty acid esters of chloropropanediols in fat-rich foods

2014 ◽  
Vol 31 (2) ◽  
pp. 95-101
Author(s):  
Xiaobo YAN ◽  
Shaoming WU ◽  
Nan LI ◽  
Huadong LV ◽  
Wusheng FU
Keyword(s):  
Fatty Acid ◽  
Fatty Acid Esters ◽  
Determination Methods ◽  
Acid Esters

Mesomorphic Behaviour of Saturated and Monounsaturated C18 and C22 Fatty Acid Esters of Cholesterol

1994 ◽  
Vol 59 (4) ◽  
pp. 833-840
Author(s):  
Slavomír Pirkl
Keyword(s):  
Phase Transitions ◽  
Fatty Acid ◽  
Fatty Acid Esters ◽  
Aliphatic Esters ◽  
Acid Esters

The phase transitions and effective optical rotary power of saturated and monounsaturated aliphatic esters of cholesterol with 18 and 22 carbon atoms in the chain have been described. The effect of cis/trans isomerism on these properties is discussed.

The occurrence of long chain polyprenols in leaves of plants of Rosaceae family and their isolation by time-extended liquid chromatography

1992 ◽  
Vol 70 (6) ◽  
pp. 448-454 ◽  
Author(s):  
Ewa Świeżewska ◽  
T. Chojnacki ◽  
W. J. Jankowski ◽  
K. Singh ◽  
J. Olsson
Keyword(s):  
Liquid Chromatography ◽  
Fatty Acid ◽  
Large Scale ◽  
Fatty Acid Esters ◽  
Large Scale Preparation ◽  
Scale Preparation ◽  
Wet Weight ◽  
Rosaceae Family ◽  
Acid Esters ◽  
Long Chain

The long chain polyprenols composed of 30 and more isoprene units from leaves of plants belonging to the genera Potentilla and Rosa have been described. They occur in the form of fatty acid esters. The composition of polyprenol mixture was species dependent and its content reached ca. 0.5% wet weight. Large scale preparation of individual polyprenols from a natural polyprenol mixture was performed using time-extended liquid chromatography on the hydrophobic gel Lipidex-5000.Key words: long chain polyprenols, Rosaceae.

Separation of Fatty Acid Dimethyl Esters on an Ionic Liquid Gas Chromatographic Column

2020 ◽  
Author(s):  
R E Pauls ◽  
B Pease
Keyword(s):  
Ionic Liquid ◽  
Fatty Acid ◽  
Stationary Phases ◽  
Carbon Number ◽  
Fatty Acid Esters ◽  
Reaction Products ◽  
Isomer Separation ◽  
Metathesis Reaction ◽  
Polydimethyl Siloxane ◽  
Acid Esters

Abstract An ionic liquid (IL) 111 column was compared with other commonly employed stationary phases including polydimethyl siloxane and polyethylene glycol for the separation of fatty acid monomethyl and dimethyl esters. The fatty acid esters employed in this study were derived from metathesis reactions of vegetable oils both with and without olefins. The IL 111 column demonstrated enhanced performance compared with conventional columns for the separation of these esters. These advantages included significantly enhanced retention of dimethyl esters relative to monomethyl esters, excellent cis/trans isomer separation and the ability to analyze higher carbon number dimethyl esters. As a result, these columns are highly suited for the analysis of mixtures of mono- and dimethyl fatty acid esters found in lipid metathesis reaction products or to determine monofunctional impurities in samples of commercial dimethyl esters.

scholarly journals Terminal Trialkylsilyl Substituent Effect of Janus-type Molecular Tubes on the Inclusion of Unsaturated Fatty Acid Esters

ACS Omega ◽  
2021 ◽  
Vol 6 (4) ◽  
pp. 3227-3231
Author(s):  
Chizuru Kogame-Asahara ◽  
Hitomi Iguchi ◽  
Kenichiro Honda ◽  
Hajime Shigemitsu ◽  
Toshiyuki Kida
Keyword(s):  
Fatty Acid ◽  
Unsaturated Fatty Acid ◽  
Substituent Effect ◽  
Fatty Acid Esters ◽  
Molecular Tubes ◽  
Acid Esters

Effect of composition of sucrose fatty acid esters on formation of palladium nanoparticles in reverse micelles

2009 ◽  
Vol 287 (7) ◽  
pp. 795-799 ◽  
Author(s):  
Hidetaka Noritomi ◽  
Kenji Kagitani ◽  
Yasutaka Muratsubaki ◽  
Satoru Kato
Keyword(s):  
Fatty Acid ◽  
Palladium Nanoparticles ◽  
Reverse Micelles ◽  
Fatty Acid Esters ◽  
Sucrose Fatty Acid Esters ◽  
Acid Esters
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