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Lu Y, Huang X, Adpressa DA, Mou L, Taylor PR, Clark BR. Vitifolignans, 3,4-dibenzyltetrahydrofuran lignans from Anemone vitifolia Buch.-Ham. PHYTOCHEMISTRY 2024; 226:114217. [PMID: 38972442 DOI: 10.1016/j.phytochem.2024.114217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Revised: 07/05/2024] [Accepted: 07/05/2024] [Indexed: 07/09/2024]
Abstract
Anemone vitifolia is a small herb found in Asia that is used to treat a range of diseases in Chinese traditional medicine. GNPS-based molecular networking of an Anemone vitifolia specimen revealed the presence of a network containing numerous ions indicating the presence of lignans, several of which suggested that there might be previously undescribed compounds in the extract. Fractionation of the organic extract yielded five undescribed lignans, the vitifolignans, together with one known. The structures were identified based on extensive spectroscopic data analysis (NMR, HR-ESI-MS, and UV), coupling constant calculation and comparison with reported data. Their absolute configurations were determined by comparison of experimental ECD spectra with calculated spectra. Compounds 4/5 showed weak inhibition of LPS-induced NO production in mouse mononuclear macrophages.
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Affiliation(s)
- Ya Lu
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 300072, Tianjin, PR China
| | - Xueyan Huang
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 300072, Tianjin, PR China
| | | | - Linyun Mou
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, Tianjin, PR China
| | - Peter R Taylor
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 300072, Tianjin, PR China
| | - Benjamin R Clark
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 300072, Tianjin, PR China.
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Abdel-Rahman MA, Soliman KA, Abdel-Azeim S, El-Nahas AM, Taketsugu T, Nakajima T, El-Meligy AB. Ab initio calculations on structure and stability of BN/CC isosterism in azulene. Sci Rep 2023; 13:10260. [PMID: 37355719 DOI: 10.1038/s41598-023-37047-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Accepted: 06/14/2023] [Indexed: 06/26/2023] Open
Abstract
Herein, we investigated the thermodynamic stability and opto-electronic properties of a newly BN-doped azulene. The gas-phase formation enthalpies of 11 BN-doped azulene were calculated by the atomization energy method using three computational models (CBS-APNO, CBS-QB3, and G3MP2). The results suggest that AZ-1N9B exhibits the highest stability among the studied isomers. On the other hand, AZ-1B9N and AZ-9B10N display nearly equal stability with relative energies of 19.36 and 19.82 kcal/mol at CBS-QB3, respectively. These two isomers are considered the least stable among the investigated compounds. The frontier molecular orbitals (FMO), ionization energies (IE), and electron affinities (EA) of these isomers were discussed. Additionally, the electronic absorption spectra of the BN-doped azulenes were computed using the TD-B3LYP/6-31 + G(d,p) and TD-CAM-B3LYP level of theories, which using a long-range corrected hybrid functional in acetone. The computational results obtained in this research are align closely with the existing literature, thereby reinforcing the credibility and reliability of our findings.
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Affiliation(s)
| | - Kamal A Soliman
- Chemistry Department, Faculty of Science, Benha University, Benha, 13518, Egypt.
| | - Safwat Abdel-Azeim
- Center for Integrative Petroleum Research (CIPR), College of Petroleum Engineering and Geosciences, King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, 31261, Saudi Arabia
| | - Ahmed M El-Nahas
- Chemistry Department, Faculty of Science, Menoufia University, Shebin El-Kom, 32512, Egypt
| | - Tetsuya Taketsugu
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, 060-0810, Japan
| | - Takahito Nakajima
- Center for Computational Science, RIKEN, 7-1-26 Minatojima-Minami, Chuo, Kobe, 650-0047, Japan
| | - Asmaa B El-Meligy
- Chemistry Department, Faculty of Science, Menoufia University, Shebin El-Kom, 32512, Egypt.
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The effect of collectors on froth stability of frother: Atomic-scale study by experiments and molecular dynamics simulations. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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