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Sixteen new limonoids, named ciparasins A-P (1-16), comprising three structural categories of trijugin-type (1-7), cipadesin-type (8-15), and prieurianin-type (16) compounds, as well as 15 known limonoid analogues (17-31), were isolated from Cipadessa cinerascens. Ciparasins E-G (5-7) were found to possess a rare γ-hydroxylbutenolide moiety at C-17. Ciparasins B (2) and P (16) showed significant anti-HIV activities, with EC50 values of 5.5 ± 0.6 (SI >7.2) and 6.1 ± 0.7 (SI >6.5) μM, respectively.


Jin-Hai Yu, Guo-Cai Wang, Ying-Shan Han, Yan Wu, Mark A Wainberg, Jian-Min Yue. Limonoids with Anti-HIV Activity from Cipadessa cinerascens. Journal of natural products. 2015 Jun 26;78(6):1243-52

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PMID: 25970729

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