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Journal Article
Research Support, Non-U.S. Gov't
Phthalide Derivatives with Anticoagulation Activities from Angelica sinensis.
Journal of Natural Products 2016 July 23
Two new phthalide derivatives, angesinenolides A and B (1 and 2), were isolated from the roots of Angelica sinensis. Their structures were elucidated using HRMS, NMR, and X-ray crystallographic data. Compound 1 is the first example of a phthalide trimer presumably formed through two [2+2] cycloaddition reactions. Compound 2 is a unique dimeric phthalide with a peroxy bridge between C-3a and C-6. Both phthalides were evaluated for in vitro anticoagulation activities. Compound 1 reduced the level of fibrinogen (FIB). Compound 2 significantly extended thrombin time and activated partial thromboplastin time, as well as markedly reduced the content of FIB.
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