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Indole Alkaloids and Chromones from the Stem Bark of Cassia alata and Their Antiviral Activities. Molecules 2022; 27:molecules27103129. [PMID: 35630603 PMCID: PMC9144915 DOI: 10.3390/molecules27103129] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Revised: 05/07/2022] [Accepted: 05/12/2022] [Indexed: 02/05/2023] Open
Abstract
The Cassia (Leguminosae) genus has attracted a lot of attention as a prolific source of alkaloids and chromones with diverse structures and biological properties. The aim of this study is to screen the antiviral compounds from Cassia alata. The extract of the stem bark of this plant was separated using silica gel, MCI, ODS C18, and Sephadex LH-20 column chromatography, as well as semi-preparative HPLC. As a result, three new indole alkaloids, alataindoleins A–C (1–3); one new chromone, alatachromone A (4); and a new dimeric chromone-indole alkaloid, alataindolein D (5) were isolated. Their structures were determined by means of HRESIMS and extensive 1D and 2D NMR spectroscopic studies. Interestingly, alataindolein D (5) represents a new type of dimeric alkaloid with an unusual N-2−C-16’ linkage, which is biogenetically derived from a chromone and an indole alkaloid via an intermolecular nucleophilic substitution reaction. Compounds 1–5 were tested for their anti-tobacco mosaic virus (TMV) and anti-rotavirus activities, and the results showed that compounds 2–4 showed high anti-TMV activities with inhibition rates of 44.4%, 66.5%, and 52.3%, respectively. These rates were higher than those of the positive control (with inhibition rate of 32.8%). Compounds 1 and 5 also showed potential anti-TMV activities with inhibition rates of 26.5% and 31.8%, respectively. In addition, compounds 1–5 exhibited potential anti-rotavirus activities with therapeutic index (TI) values in the range of 9.75~15.3. The successful isolation and structure identification of the above new compounds provided materials for the screening of antivirus drugs, and contributed to the development and utilization of C. alata.
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Zhou T, Gao Q, Mi QL, Yang FX, Wu F, Zhu YN, Liu L, Li J, Liu X, Kong WS, Yang GY, Hu QF, Li XM. Two New Benzo[C]Azepin-1-Ones from Whole Plants of Thalictrum glandulosissimum and their Antibacterial Activity. Chem Nat Compd 2022. [DOI: 10.1007/s10600-022-03653-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Xu L, Zhou T, Zhang JD, Deng LL, Jiang JR, Yang WW, Liu CB, Kong WS, Li XM, Yang GY, Hu QF, Liu X. Two New Anti-Tobacco Mosaic Virus Isoindolin-1-Ones from the Leaves of Nicotiana tabacum. Chem Nat Compd 2021. [DOI: 10.1007/s10600-021-03547-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Zhou T, Yang FX, Cai BB, Wu F, Zhu YN, Liu L, Liu CB, Ling J, Kong WS, Yang GY, Hu QF, Liu X. Anti-Tobacco Mosaic Virus Chromone Derivatives from the Stems of Nicotiana tabacum. Chem Nat Compd 2021. [DOI: 10.1007/s10600-021-03540-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Chemical Constituents of the Roots of Phlomis betonicoides and Their Anti-Rotavirus Activity. Chem Nat Compd 2021. [DOI: 10.1007/s10600-021-03499-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Two New Isoquinoline Alkaloids from Whole Plants of Thalictrum glandulosissimum and their Anti-TMV Activity. Chem Nat Compd 2020. [DOI: 10.1007/s10600-020-03071-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Isoquinoline Alkaloids from Whole Plants of Thalictrum cirrhosum and Their Antirotavirus Activity. Chem Nat Compd 2020. [DOI: 10.1007/s10600-020-03072-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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