Alatains A and B, unique hetero-dimeric polyphenols from Cassia alata and their anti-tobacco mosaic virus activity.
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ID: 189305
2020
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Abstract
Two structurally unique polyphenols, alatains A (1) and B (2), were isolated from the bark of Cassia alata. Their structures were elucidated on the basis of spectroscopic analysis. Compounds 1 and 2 represent a new type of hetero-dimeric polyphenols with a C-14-C-5' linkage, biogenetically formed by an unusual intermolecular oxidative phenol-coupling reaction between a chromone unit and an isocoumarin moiety. Moreover, compounds 1 and 2 showed significant anti-tobacco mosaic virus (anti-TMV) inhibition IC values of 18.8 and 11.4 μM, respectively. Alatains A and B also exhibited promising protective effects on TMV infection of the host plants (Nicotiana tabacum) with the inhibition rates of 54.6% and 69.7% at the concentration of 20 μM, respectively. The results provided a new structural template for potential anti-TMV agent discovery.
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zhou2020alatainsfitoterapia
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| Authors | Zhou, Min;Liu, Caiyan;Yang, Jiamei;Niu, Deyun;Dong, Miao;Yang, Guangyu;Li, Xuemei;Hu, Qiufen; |
| Journal | Fitoterapia |
| Year | 2020 |
| DOI |
S0367-326X(20)30345-2
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