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Isolation of a new iso-quinoline alkaloid and cytotoxicity studies of pure compounds and crude extracts of Ravenia spectabilis engl.

ABSTRACT: A new 2-quinolone alkaloid, iso-oligophyline (1), and two very unusual C34 terpenoids, proposed names ravespanol (2) and ravespanone (3), along with two known compounds, β-sitosterol (4), and methyl linoleate (5), were isolated from the leaf extract of Ravenia spectabilis engl. Methyl linoleate constitutes the first report of isolation from this species. We have already reported the isolation of atanine (6), oligophyline (7), ravenoline (8), and arborinine (9) from the plant. Based on nuclear magnetic resonance (NMR) spectroscopy and mass spectrometric analysis, the structure of the isolated chemicals was determined. The crude fractions and four compounds (6,7,8 and 9) were evaluated for a cytotoxicity study on a panel of six human stomach cancer cell lines (SCL, SCL-6, SCL-37'6, SCL-9, K-3, N21) by MTT assay. Among the plant extracts and isolated compounds, petroleum ether fraction and compound 7 exhibited the highest cytotoxic activity against SCL and SCL-6 cells, where the IC50 values were 17.9 and 16.56 μM, respectively.

SUBMITTER: Tabassum F 

PROVIDER: S-EPMC11305309 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature

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Isolation of a new iso-quinoline alkaloid and cytotoxicity studies of pure compounds and crude extracts of <i>Ravenia spectabilis</i> engl.

Tabassum Fatema F   Islam Sheikh Nazrul SN   Tuz-Zohora Fatema F   Hasan Choudhury Mahmood CM   Rahman Khondaker Miraz KM   Ahsan Monira M  

Heliyon 20240711 14

A new 2-quinolone alkaloid, iso-oligophyline (<b>1</b>), and two very unusual C<sub>34</sub> terpenoids, proposed names ravespanol (<b>2</b>) and ravespanone (<b>3</b>), along with two known compounds, β-sitosterol (<b>4</b>), and methyl linoleate (<b>5</b>), were isolated from the leaf extract of <i>Ravenia spectabilis engl</i>. Methyl linoleate constitutes the first report of isolation from this species. We have already reported the isolation of atanine (<b>6</b>), oligophyline (<b>7</b>), rav  ...[more]

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