Abstract
Rhododendron, one of the most famous ornamental plants in the world, is traditionally a medicinal plant. However, the potential bioactivities of native Rhododendron in Taiwan have not been completely studied. In this study, the results revealed that Rhododendron pseudochrysanthum exhibited the best antioxidant activities among 10 native Rhododendron species in Taiwan. Furthermore, based on a bioactivity-guided isolation principle, nine specific phytochemicals were isolated and identified as (2R,3S)-catechin (1), (2R,3R)-epicatechin (1'), (2R,3R)-dihydromyricetin 3-O- β -l-arabinopyranoside (2), (2S,3S)-taxifolin 3-O- β -l-arabinopyranoside (2'), (2R,3R)-taxifolin 3-O- β -l-arabinopyranoside (3), myricetin 3-O- β -d-glucopyranoside (3'), rutin (4), hyperoside (5), and quercitrin (6). Of these compounds, 2 and 3 were found to be major bioactive compounds, and their concentrations in the n-butanol (BuOH) fraction were determined to be 52.0 and 67.3 mg per gram, respectively. These results demonstrated that methanolic extracts of Rhododendron pseudochrysanthum leaves have excellent antioxidant activities and great potential as a source for natural health products.
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Claims 6
Claim · model-written summary
Rhododendron pseudochrysanthum had the best antioxidant activities among 10 native Rhododendron species in Taiwan.
- Taxon
- Rhododendron pseudochrysanthum
Rhododendron pseudochrysanthume0 - Outcome
- antioxidant activitiese0
- Direction
- beste0
- Qualifier
- among 10 native Rhododendron species in Taiwane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rhododendron pseudochrysanthum exhibited the best antioxidant activities among 10 native Rhododendron species in Taiwan”
Claim · model-written summary
Nine specific phytochemicals were isolated and identified from native Rhododendron leaf extracts.
- Taxon
- Rhododendron
Rhododendront0 - Outcome
- nine specific phytochemicalse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Leaf Extracts from 10 Native Rhododendron Species in Taiwan”
e1“nine specific phytochemicals were isolated and identified as”
Claim · model-written summary
Compound 2, (2R,3R)-dihydromyricetin 3-O-arabinopyranoside, was a major bioactive compound at 52.0 mg per gram in the BuOH fraction.
- Taxon
- RhododendronRhododendront0
- Compound
- (2R,3R)-dihydromyricetin 3-O- β -l-arabinopyranosidee3
- Outcome
- concentrations in the n-butanol (BuOH) fractione2
- Value
- 52.0e2
- Qualifier
- major bioactive compoundse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Leaf Extracts from 10 Native Rhododendron Species in Taiwan”
e2“2 and 3 were found to be major bioactive compounds, and their concentrations in the n-butanol (BuOH) fraction were determined to be 52.0 and 67.3 mg per gram, respectively”
e3“(2R,3R)-dihydromyricetin 3-O- β -l-arabinopyranoside (2)”
Claim · model-written summary
Compound 3, (2R,3R)-taxifolin 3-O-arabinopyranoside, was a major bioactive compound at 67.3 mg per gram in the BuOH fraction.
- Taxon
- RhododendronRhododendront0
- Compound
- (2R,3R)-taxifolin 3-O- β -l-arabinopyranosidee4
- Outcome
- concentrations in the n-butanol (BuOH) fractione2
- Value
- 67.3e2
- Qualifier
- major bioactive compoundse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Leaf Extracts from 10 Native Rhododendron Species in Taiwan”
e2“2 and 3 were found to be major bioactive compounds, and their concentrations in the n-butanol (BuOH) fraction were determined to be 52.0 and 67.3 mg per gram, respectively”
e4“(2R,3R)-taxifolin 3-O- β -l-arabinopyranoside (3)”
Claim · model-written summary
Methanolic extracts of Rhododendron pseudochrysanthum leaves had excellent antioxidant activities.
- Taxon
- Rhododendron pseudochrysanthumRhododendron pseudochrysanthume5
- Material
- methanolic extractse5
- Outcome
- antioxidant activitiese5
- Direction
- excellente5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“methanolic extracts of Rhododendron pseudochrysanthum leaves have excellent antioxidant activities and great potential as a source for natural health products”
Claim · model-written summary
Methanolic extracts of Rhododendron pseudochrysanthum leaves have potential as a source for natural health products.
- Taxon
- Rhododendron pseudochrysanthumRhododendron pseudochrysanthume5
- Outcome
- source for natural health productse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“methanolic extracts of Rhododendron pseudochrysanthum leaves have excellent antioxidant activities and great potential as a source for natural health products”