Xia Liu, Min Yu, Jie Chen, Bin Hu, Jia-Bo Huang, Wei-Qun Yang, Zhong-Xiang Zhao
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引用次数: 0
Abstract
Three previously undescribed 5,6,7,8-tetrahydro-2-(2-phenylethyl)chromones, (5S,6R,7S,8S)-8-chloro-5-ethoxy-6,7-dihydroxy-2-[2-(4'-methoxyphenyl)ethyl]-5,6,7,8-tetrahydrochromone (1), (5R,6S,7R,8R)-8-chloro-5-ethoxy-6,7-dihydroxy-2-(2- phenylethyl)-5,6,7,8-tetrahydrochromone (2), (5S,6R,7S,8R)-5,8-dichloro-6,7- dihydroxy-2-[2-(4'-methoxyphenyl)ethyl]-5,6,7,8-tetrahydrochromone (3), and 28 known analogues (4-31) were isolated from the stems of Aquilaria sinensis. Their structures were characterized by the spectroscopic methods, and the absolute configuration was resolved by circular dichroism (CD) spectroscopy. Bioactivity evaluation indicated that compounds 3-8 had significant inhibition effect in the production of NO in an inflammatory cell model with relatively lower IC50 values of 5.54, 11.44, 3.68, 7.15, 10.26 and 13.04 μM, respectively, compared to the positive control Indomethacin (IC50 = 23.03 μM).
期刊介绍：
Fitoterapia is a Journal dedicated to medicinal plants and to bioactive natural products of plant origin. It publishes original contributions in seven major areas:
1. Characterization of active ingredients of medicinal plants
2. Development of standardization method for bioactive plant extracts and natural products
3. Identification of bioactivity in plant extracts
4. Identification of targets and mechanism of activity of plant extracts
5. Production and genomic characterization of medicinal plants biomass
6. Chemistry and biochemistry of bioactive natural products of plant origin
7. Critical reviews of the historical, clinical and legal status of medicinal plants, and accounts on topical issues.
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