New acylated flavonol glycosides from the aerial parts of Gouania longipetala |
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| Affiliation: | 1. ICMR-UMR CNRS 7312, Groupe Isolement et Structure, Campus Sciences, Bât. 18, BP 1039, 51687 Reims Cedex 2, France;2. Laboratoire de Chimie Organique Biologique, 01 BPV 34 Abidjan 01, Université Félix-Houphouët Boigny d’Abidjan-Cocody, Cote d’Ivoire;3. ICMR-UMR CNRS 7312, Service Commun d’Analyses, Campus Sciences, Bât. 18, BP 1039, 51687 Reims Cedex 2, France;1. School of Pharmacy, Shihezi University, Shihezi 832002, China;2. Xinjiang Academy of Forestry, Urumqi 830000, China;3. School of Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, China;1. Jiangsu Kanion Pharmaceutical Co. Ltd., 58 South Haichang Road, Lianyungang 222001, PR China;2. State Key Laboratory of New-tech for Chinese Medicine Pharmaceutical Process, Lianyungang 222001, PR China;3. Key Laboratory of Tropical Medicinal Plant Chemistry of Ministry of Education, Hainan Normal University, Haikou 571158, PR China;1. College of Resource and Environment, Yuxi Normal University, Yuxi 653100, PR China;2. Key Laboratory of Chemistry in Ethnic Medicinal Resources, State Ethnic Affairs Commission & Ministry of Education, Yunnan University of Nationalities, Kunming 650031, PR China;3. College of Resources and Environment, Southwest University, Chongqing 400716, PR China;1. School of Life Science, Beijing Institute of Technology, Beijing 100081, PR China;2. Beijing BIT&GY Pharmaceutical R&D Co. Ltd., Beijing 100081, PR China;1. Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China;2. State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau 999078, China |
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| Abstract: | Two new flavonol diglycosides kaempferol-3-O-(6-O-E-coumaroyl)-β-d-galactopyranosyl-(1→2)-α-l-rhamnopyranoside and kaempferol-3-O-(6-O-E-feruloyl)-β-d-galactopyranosyl-(1→2)-α-l-rhamnopyranoside were isolated from the aerial parts of Gouania longipetala in addition to seven known compounds. The structure elucidation of these compounds was based on analyses of spectroscopic data including 1D- and 2D-NMR and HR-ESI-MS techniques. The abilities of these compounds to scavenge the DPPH were evaluated. Results showed that compounds 2, 3, 8 and 9 have antioxidant potential with EC50 values ranging from 13.8 to 47.4 μM, compared with ascorbic acid (EC50 60 μM) which was used as positive control. |
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| Keywords: | Rhamnaceae Flavonoids DPPH free radical scavenging activity |
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