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  • Title: Cytotoxic 2,3-secoaromadendrane-type sesquiterpenoids from the liverwort Plagiochila ovalifolia.
    Author: Toyota M, Tanimura K, Asakawa Y.
    Journal: Planta Med; 1998 Jun; 64(5):462-4. PubMed ID: 9690351.
    Abstract:
    The ether extract of the Japanese liverwort, Plagiochila ovalifolia Mitt. (Plagiochilaceae) yielded three 2,3-secoaromadendrane-type sesquiterpenoids, plagiochiline-A-15-yl octanoate, 14-hydroxyplagiochiline-A-15-yl 2E,4E-dodecadienoate and 14-hydroxyplagiochiline-A-15-yl 2E,4E,8Z-tetradecatrienoate. The two latter compounds were first isolated from the Plagiochila species. The structures of the new compounds were elucidated by spectroscopy. Plagiochiline-A-15-yl octanoate and 14-hydroxyplagiochiline-A-15-yl 2E,4E-dodecadienoate showed significant cytotoxicity against P-388 murine leukemia tumor cells, both compounds exhibiting an ID50 of 0.05 microgram/ml. Plagiochiline A also showed cytotoxic activity. The ID50 was 3.0 micrograms/ml.
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