Chemical Constituents of Cycas aenigma

Ng, Vincent Antonio S.; Agoo, Esperanza Maribel G.; Shen, Chien‐Chang; Ragasa, Consolacion Y.

doi:10.7324/japs.2015.50906

Cited by 7 publications

(25 citation statements)

References 31 publications

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“…Silica gel chromatography of the dichlorometnahe extract of the leaves of P. nauseosa afforded squalene (1), βsitosterol (2) and stigmasterol (3). The NMR spectra of 1 are in accordance with data reported in the literature for squalene 3 ; 2 for β-sitosterol 4 ; and 3 for stigmasterol 4 4 . Although no biological tests were conducted on the isolated compounds, a literature search of 1-3 revealed that these have diverse bioactivities.…”

Section: Resultssupporting

confidence: 87%

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Triterpene and Sterols from Premna nauseosa Blanco

Apostol

Fran²,

Shen

et al. 2017

IJPCR

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Section: Resultssupporting

confidence: 87%

“…Furthermore, the ethanolic extract possessed 78% free radical scavenging activity based on DPPH assay 2 . In this study, the dichloromethane extract of P. nauseosa leaves yielded squalene (1) and a mixture of β-sitosterol (2) and stigmasterol (3). The structures of 1-3 are presented in Fig.…”

Section: Introductionmentioning

confidence: 79%

Triterpene and Sterols from Premna nauseosa Blanco

Apostol

Fran²,

Shen

et al. 2017

IJPCR

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“…Silica gel chromatography of the dichloromethane extracts of D. dao yielded 1-11. The NMR spectra of 1 are in accordance with data reported in the literature forcardanol; 7 2 for βsitosteryl3βglucopyranoside6' Ofatty acid esters; 8 3 for βsitosteryl fatty acid ester; 9 4a for βsitosterol; 10 4b for stigmasterol; 10 5 for anacardic acid; 11 6 for triacylglycerols; 12 7 for monoacylglycerol; 10 8 for longchain fatty acid esters; 13 9 for linoleic acid; 14 10 for longchain fatty alcohols; 15 and 11 for longchain hydro carbons. 16…”

Section: Resultssupporting

confidence: 85%

Chemical Constituents of Dracontomelon Dao (Blanco) Merr. et Rolfe

Ragasa¹,

Batarra²,

Vivar³

et al. 2017

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Dracontomelon dao (Blanco) Merr. et Rolfe of the family Anacardiaceae, locally known as dao is an indigenous Philippine tree which is also widely distributed through out the South and Southeast Asia. 1 The dao bark is used against dysentery. The mature fruits and kernel of the seeds are edible, while the flowers and young leaves are eaten as vegetables. The wood of dao is employed in light construction, timber and firewood. 2 The EtOAc extract of the leaves of D. dao was observed to exhibit strong antibacterial activity with an IC 50 of 98.5 µg/mL. 3 The crude methanolic extracts of the leaves, stem and root barks of D. dao exhibited a very good level of broad spectrum antibacterial activity, while the leaf extract exhibited antifungal activity. 4 The essential oil was extracted from the skins of stem of D. dao by steam distillation. GCMS analysis identified 13 compounds with the following major components: nhexadecanoic acid (46.13%), octadeca noic acid (15.44%), (E)9octadecenoic acid (13.73%), and (Z,Z)9,12octadecadienoic acid (7.79%). 5 We earlier reported the isolation of anacardic acid, βsitosteryl3βglucopyranoside6'Ofatty acid esters, βsitosterol, phytol, phytyl fatty acid esters, βsitosteryl fatty acid esters, chlorophyll a, squalene, longchain fatty alcohols, and longchain hydrocarbons from the leaves of D. dao. 6 We report herein the isolation ofcardol (1), βsitosteryl3βglucopyranoside6, Ofatty acid esters (2), βsitosteryl fatty acid esters (3), and a mixture Chemical Constituents of Dracontomelon Dao (Blanco) Merr. et Rolfe ABSTRACT Introduction: The leaves, twigs and flowers of Dracontomelon dao (Blanco) Merr. et Rolfe, an indigenous Philippine tree were investigated for their chemical constituents. Methods: The compounds were isolated by silica gel chromatography and their structures were identified by NMR spectroscopy. Results: Chemical investigation of D. dao led to the isolation of cardol (1), β-sitosteryl-3β-glucopyranoside-6, O-fatty acid esters (2), β-sitosteryl fatty acid esters (3), and a mixture of β-sitosterol (4a) and stigmasterol (4b) from the petiole; 1, a mixture of 4a and 4b, anacardic acid (5), triacylglycerols (6), monoacylglycerol (7), long-chain fatty acid esters (8), and linoleic acid (9) from the twigs; and a mixture of 4a and 4b, 5, 6, 8, long-chain fatty alcohols (10), and long-chain hydrocatbons (11) from the flowers of D. dao.The structures of 1 and 5 were elucidated by extensive 1D and 2D NMR spectroscopy, while those of 2-4 and 6-11 were identified by NMR spectroscopy. Conclusion: This is the first report on the isolation of 1, 4b and 6-9 from D. dao.

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“…The structure of β-friedelinol (1) was elucidated by extensive 1D and 2D NMR spectroscopy and confirmed by comparison of its NMR data with those reported in the literature for β-friedelinol [7]. The NMR spectra of lupeol (2) are in accordance with data reported in the literature for lupeol [8]; squalene (3) for squalene [9]; polyprenol (4) for polyprenol [10]; β-sitosterol (5) for βsitosterol [11]; long-chain hydrocarbons (6) for long-chain hydrocarbons [12]; chlorophyll-a (7) for chlorophyll-a [13] and triacylglycerols (8) for triacylglycerols [14].…”

Section: Isolation Of Chemical Constituents From Leaves Of a A Ghaesupporting

confidence: 83%

Chemical Constituents of Leaves and Fruit of Antidesma ghaesembilla Gaertn.

Gonzales¹,

Shen²,

Ragasa³

2017

Asian J. Chem.

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Antidesma ghaesembilla Gaertn. (family: Phyllanthaceae) is a plant indigenous of Philippines. Locally known as binayuyo, the young shoots are used as a vegetable and as a spice [1]. The leaves are used as a poultice to treat headaches, scurf, abdominal swellings and fevers. The stems are emmen-agogue and the fruit is purgative. The fully ripe fruit can be eaten raw, cooked or made into jams and jellies [2]. A previous study reported that the crude methanol extract of A. ghaesembilla Gaertn. leaves exhibited moderate to strong antioxidant potential and showed significant hypoglycemic potential [3]. Recently, the methanolic extract of A. ghaesembilla leaves was reported to exhibit antithrombotic, cytotoxic and antibacterial activities [4]. Chemical studies on the leaves of A. ghaesembilla reported the isolation of a megastigmane, vomifoliol [5] and the flavone glycosides, vitexin, orientin, isovitexin and homoorientin [6]. We report herein the isolation of β-friedelinol (1), lupeol (2), squalene (3), polyprenol (4), β-sitosterol (5), long-chain hydrocarbons (6) and chlorophyll-a (7) from the leaves and β-sitosterol (5) and triacylglycerols (8) from the fruit of A. ghaesembilla. To the best of our knowledge this is the first report on the isolation of compounds 1-8 from A. ghaesembilla. NMR spectra were recorded on a Varian VNMRS spectrometer in CDCl 3 at 600 MHz for 1 H NMR and 150 MHz for 13 C NMR spectra. Column chromatography was performed with silica gel 60 (70-230 mesh). Thin layer chromatography was NOTE Chemical Constituents of Leaves and Fruit of Antidesma ghaesembilla Gaertn.

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Chemical Constituents of Cycas aenigma

Cited by 7 publications

References 31 publications

Triterpene and Sterols from Premna nauseosa Blanco

Triterpene and Sterols from Premna nauseosa Blanco

Chemical Constituents of Dracontomelon Dao (Blanco) Merr. et Rolfe

Chemical Constituents of Leaves and Fruit of Antidesma ghaesembilla Gaertn.

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