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• W3200905550 abstract "The aim of the present study is to report the isolation, structural elucidation, and antiviral evaluation of four new withanolide-type steroids, named nicansteroidins A-D (1-4), together with nine related known compounds (5-13) isolated from the aerial parts of Physalis nicandroides. Their structures were established based on an extensive spectroscopic analysis, including 1D and 2D NMR techniques. Outstandingly, nicansteroidins A and B possess an unusual side chain with an exocyclic double bond on the δ-lactone system, whereas nicansteroidins C and D have an uncommon cycloperoxide functionality in ring A as distinct structural motifs. Their biological evaluation as inhibitors of human immunodeficiency virus type 1 replication revealed that two compounds from this series, 7 and 13, displayed strong inhibition of HIV-1 replication with IC50 values lower than 2 μM. Moreover, cellular mechanism experiments showed that the main target of these compounds in the HIV replication cycle is viral transcription. This study is the first report of withanolide-type steroids as HIV inhibitors and provides insight into their potential as candidates for further preclinical studies." @default.
• W3200905550 created "2021-09-27" @default.
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• W3200905550 date "2021-09-22" @default.
• W3200905550 modified "2023-10-12" @default.
• W3200905550 title "Withanolide-Type Steroids from <i>Physalis nicandroides</i> Inhibit HIV Transcription" @default.
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• W3200905550 doi "https://doi.org/10.1021/acs.jnatprod.1c00637" @default.
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