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Sun YJ, Bai HY, Han RJ, Zhao QL, Li M, Chen H, Si YY, Xue GM, Zhao ZZ, Feng WS. Dysosmaflavonoid A-F, new flavonols with potent DPPH radical scavenging activity from Dysosma versipellis. Fitoterapia 2023; 166:105440. [PMID: 36736596 DOI: 10.1016/j.fitote.2023.105440] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Revised: 01/27/2023] [Accepted: 01/29/2023] [Indexed: 02/03/2023]
Abstract
Six new flavonols, including four glucosylated flavonols (dysosmaflavonoid A-D), one phenylpropanoid-substituted flavonol (dysosmaflavonoid E), and one phenyl-substituted flavonol (dysosmaflavonoid F), together with five known analogues, were isolated from the roots and rhizomes of Dysosma versipellis. Their structures were elucidated by comprehensive analysis of their NMR, IR, UV, HRESIMS, and HPLC data. The antioxidant activities of all isolated compounds were examined by 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging assay. Compounds 2, 3, 5-8, and 12 exhibited significant DPPH scavenging capacity with IC50 values of 33.95, 39.02, 31.17, 32.79, 31.85, 30.48, and 23.75 μM, respectively, in comparison with Trolox (IC50, 15.80 μM). Compound 12 displayed more potent DPPH radical scavenging activity than prenylated and (or) glucosided derivatives (2-4, or 10). The preliminary structure-activity relationship showed that the catechol structure in flavonol is essential for DPPH radical scavenging effect.
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Affiliation(s)
- Yan-Jun Sun
- Co-construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases by Henan & Education Ministry of P. R. China, Henan University of Chinese Medicine, Zhengzhou 450046, People's Republic of China; School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, People's Republic of China.; Henan Research Center for Special Processing Technology of Chinese Medicine, Zhengzhou 450046, People's Republic of China.
| | - Hong-Yun Bai
- Co-construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases by Henan & Education Ministry of P. R. China, Henan University of Chinese Medicine, Zhengzhou 450046, People's Republic of China; School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, People's Republic of China
| | - Rui-Jie Han
- Co-construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases by Henan & Education Ministry of P. R. China, Henan University of Chinese Medicine, Zhengzhou 450046, People's Republic of China; School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, People's Republic of China
| | - Qi-Lu Zhao
- Co-construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases by Henan & Education Ministry of P. R. China, Henan University of Chinese Medicine, Zhengzhou 450046, People's Republic of China; School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, People's Republic of China
| | - Meng Li
- Co-construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases by Henan & Education Ministry of P. R. China, Henan University of Chinese Medicine, Zhengzhou 450046, People's Republic of China; School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, People's Republic of China
| | - Hui Chen
- Co-construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases by Henan & Education Ministry of P. R. China, Henan University of Chinese Medicine, Zhengzhou 450046, People's Republic of China; School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, People's Republic of China
| | - Ying-Ying Si
- Co-construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases by Henan & Education Ministry of P. R. China, Henan University of Chinese Medicine, Zhengzhou 450046, People's Republic of China; School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, People's Republic of China
| | - Gui-Min Xue
- Co-construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases by Henan & Education Ministry of P. R. China, Henan University of Chinese Medicine, Zhengzhou 450046, People's Republic of China; School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, People's Republic of China
| | - Zhen-Zhu Zhao
- Co-construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases by Henan & Education Ministry of P. R. China, Henan University of Chinese Medicine, Zhengzhou 450046, People's Republic of China; School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, People's Republic of China
| | - Wei-Sheng Feng
- Co-construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases by Henan & Education Ministry of P. R. China, Henan University of Chinese Medicine, Zhengzhou 450046, People's Republic of China; School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, People's Republic of China..
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Heng MY, Thuerig B, Danton O, Ramseyer J, Gupta MP, Tamm L, Hamburger M, Potterat O. Ingadosides A-C, acacic acid-type saponins from Inga sapindoides with potent inhibitory activity against downy mildew. PHYTOCHEMISTRY 2022; 199:113183. [PMID: 35398089 DOI: 10.1016/j.phytochem.2022.113183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 03/23/2022] [Accepted: 03/31/2022] [Indexed: 06/14/2023]
Abstract
As part of a project aiming at the discovery of environmentally friendly alternatives to copper in organic agriculture, a 96% ethanolic extract from the leaves of Inga sapindoides showed potent inhibitory activity against grapevine downy mildew (Plasmopara viticola) in vitro (MIC100 25 μg/mL). Separation of the n-BuOH soluble fraction by silica gel column chromatography followed by a combination of RP18 and HILIC HPLC resulted in the isolation of a series of bidesmosidic saponins characterized by the presence of a monoterpenoid unit attached to a triterpenoid aglycone, a p-methoxycinnamoyl residue, and rare sugar residues such as N-acetyl-d-glucosamine, d-quinovose, and d-fucose. The isolated compounds inhibited the formation or activity of P. viticola zoospores with MIC100 values of 3 or 6 μg/mL, respectively. I. sapindoides, a tree which is often cultivated for shading coffee plantations in Central America, may represent a sustainable source of fungicidal products to be used in the replacement of copper.
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Affiliation(s)
- Ming Yuan Heng
- Division of Pharmaceutical Biology, Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, 4056, Basel, Switzerland
| | - Barbara Thuerig
- Research Institute of Organic Agriculture FiBL, Ackerstrasse 113, 5070, Frick, Switzerland
| | - Ombeline Danton
- Division of Pharmaceutical Biology, Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, 4056, Basel, Switzerland
| | - Justine Ramseyer
- Division of Pharmaceutical Biology, Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, 4056, Basel, Switzerland
| | - Mahabir P Gupta
- Center for Pharmacognostic Research on Panamanian Flora, Faculty of Pharmacy, University of Panama City, Panama
| | - Lucius Tamm
- Research Institute of Organic Agriculture FiBL, Ackerstrasse 113, 5070, Frick, Switzerland
| | - Matthias Hamburger
- Division of Pharmaceutical Biology, Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, 4056, Basel, Switzerland
| | - Olivier Potterat
- Division of Pharmaceutical Biology, Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, 4056, Basel, Switzerland.
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