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spiranthes/flavonoid
Nuoroda įrašoma į mainų sritį
5 rezultatus
In vitro antioxidant activities, free radical scavenging capacity, and tyrosinase inhibitory of flavonoid compounds and ferulic acid from Spiranthes sinensis (Pers.) Ames.
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In this study, ultrasound-assisted extraction (UAE) and other methods of extracting flavonoid compounds and ferulic acid (FA) from S. sinensis were investigated. Five different extraction methods, including water extraction (W), water extraction using UAE (W+U), 75% ethanol extraction (E), 75%
Flavonoid constituents from Spiranthes australis LINDL.
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Chemical investigation of the whole plant of Spiranthes australis (R. BROWN) LINDL. resulted in the isolation and characterization of three new flavonoid constituents, 5-hydroxy-4'-[(2-isopentenyl)oxy]-3,7,3'-trimethoxyflavone (1),
A new flavanoid from the whole plant of Spiranthes australis (R. Brown) Lindl.
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A new flavonoid was isolated from the whole plant of Spiranthes australis (R. Brown) Lindl (Orchidacea). Its structure was characterized as 3,7-dimethoxy-5-hydroxy-2-([4-(3-methyl-2-butenyl)oxy]phenyl)-4H-1-benzopyran-4-one on the basis of chemical and spectral evidence including 2D NMR analysis.
New dimeric phenanthrene and flavone from Spiranthes sinensis.
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From the whole plant of Spiranthes sinensis, one novel dimeric phenanthrene, 2,2'-dihydroxy-5,5',7,7'-tetramethoxy-9,9',10,10'-tetrahydro-3,3'-biphenanthrene (1) and flavone 5-hydroxy-3,7-dimethoxy-4'-(1-hydroxy-3-methylbut-3-en-2-yloxy)-flavone (2) were isolated along with three other known
Bioactivity-Guided Isolation of Cytotoxic Phenanthrenes from Spiranthes sinensis.
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Bioactivity-guided separation led to the isolation of six novel phenanthrenes, spiranthesphenanthrenes A-F (1-6), together with 19 known compounds, including seven phenanthrenes (7-13), one bibenzyl compound (14), five flavonoids (15-16 and 20-22), and six simple phenolic compounds (17-19 and
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