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  • Title: Phukettosides A-E, mono- and bis-iridoid glycosides, from the leaves of Morinda umbellata L.
    Author: Kaweetripob W, Thongnest S, Boonsombat J, Batsomboon P, Salae AW, Prawat H, Mahidol C, Ruchirawat S.
    Journal: Phytochemistry; 2023 Dec; 216():113890. PubMed ID: 37852566.
    Abstract:
    Four undescribed bis-iridoid glycosides, named phukettosides A-D, and one iridoid glycoside, referred to as phukettoside E, were isolated and fully characterized from the leaves of Morinda umbellata L. Phytochemical analysis also revealed the presence of eight known compounds. The structures were determined through extensive analysis of 1D and 2D-NMR spectroscopic and HRMS spectral data, and the absolute configurations of the isolates were deduced through ECD calculations. Biogenetic pathways for the bis-iridoid glycosides, phukettosides A-C, through intermolecular Diels-Alder type reactions, were proposed. The isolated compounds, with the exception of phukettosides B and D, were evaluated against a panel of cancer cell lines (MOLT-3, HuCCA-1, A549, HeLa, HepG2, and MDA-MB-231) and a non-cancerous cell line (MRC-5) for their cytotoxicity. None of the isolates had significant cytotoxic effects on the tested cell lines.
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