Composition of volatile oil from the leaves of Uncaria sessilifructus Roxb.

The chemical compositions of the volatile oil from the leaves of Uncaria sessilifructus Roxb., obtained by hydrodistillation, was analyzed by gas chromatography-mass spectrometry. A total of 70 compounds were identified representing 97.62% of total oil composition. Major components of the volatile oil were esters (30.45%)> alkane (12.45%)> olefine aldehyde (11.69%)> alkene (11.02%)> Ketene (8.06%), the large concentrations of the chemical composition is methyl salicylate, fumaricacid, tetradecyl trans-hex-3-enyl ester, squalene, bicyclo[2.2.1]heptane analysis based on principal components of Uncaria sessilifructus Roxb. The results showed that established GC-MS analysis method can comprehensively reflect the compositions of the volatile oil from the leaves of Uncaria sessilifructus Roxb. , and provide scientific evidences for further exploitation.