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breynia rostrata/phenolic
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5 risultati
Terpenic and phenolic glycosides from leaves of Breynia officinalis HEMSL.
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From the leaves of Breynia officinalis, collected on Okinawa Island, six terpenic glucosides and six phenolic glycosides were isolated. Two of the terpenic glucosides were found to be known, and they were identified as turpinionoside B and betulalbuside A. The structures of the remaining terpenic
Phenolic compounds from the leaves of Breynia officinalis and their tyrosinase and melanogenesis inhibitory activities.
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From the EtOAc-soluble fraction of a MeOH extract of the leaves of Breynia officinalis, five new compounds (1-5) along with 11 known compounds (6-16) were isolated. The structures of the new compounds were elucidated by spectroscopic methods and compounds 1-3 were found to be acylated hydroquinone
Phytochemical screening and in vitro amylase inhibitory effect of the leaves of Breynia retusa.
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This study was proposed based on the folklore claim and on the scarcity of scientific evidence from the literature for the medicinal uses of Breynia retusa. The aim of the present study was to analyse the phytochemical constituents of the leaves of B. retusa. The fractions obtained by successive
[The chemical constituents of Breynia rostrata].
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OBJECTIVE
To study the chemical constituents of Breynia rostrata Merr.
METHODS
Chromatography was used to isolate and purify the chemical constituents, their structures were identified by spectral analysis.
RESULTS
Four glycosides were identified as 6-O-methylpropanoyl-alpha-D-glucopyranoside (1),
Catalytic reduction of 4-nitrophenol using biogenic gold and silver nanoparticles derived from Breynia rhamnoides.
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A simple, green method is described for the synthesis of Gold (Au) and Silver (Ag) nanoparticles (NPs) from the stem extract of Breynia rhamnoides. Unlike other biological methods for NP synthesis, the uniqueness of our method lies in its fast synthesis rates (~7 min for AuNPs) and the ability to
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