lc ms guided isolation of two anti inflammatory cyclic dihydrochalcane trimers from chinese dragon s blood

Mice RAW 264.7 Cells Plant Extracts Anti-Inflammatory Agents Animals Nitric Oxide 01 natural sciences Dracaena Mass Spectrometry 0104 chemical sciences Chromatography, Liquid
DOI: 10.19540/j.cnki.cjcmm.20190603.201 Publication Date: 2019-07-01
ABSTRACT
As an important integral part of traditional Chinese medicine chemical biology( TCMCB),it is of great importance to rapid isolate,and reliably identify the chemical components in herbal medicines. Phytochemical studies on the anti-inflammatory active part of Chinese dragon's blood,the red resin of Dracaena cochinchinensis,resulted in the isolation of two compounds,nordracophane( 1) and dracophane( 2),using LC-MS and chromatographic techniques( Silica gel,ODS and preparative HPLC). The structures,cyclic dihydrochalcane trimers,were elucidated on the basis of 1 D and 2 D NMR,MS,IR and UV spectral analysis. Compound 1 is a new compound,and 2 is isolated from D. cochinchinensis for the first time. Both compounds exhibited significant inhibition of nitric oxide production in lipopolysaccharides( LPS)-stimulated RAW264. 7 cells with IC50 values of( 14. 9±4. 50) and( 9. 0±0. 7) μmol·L-1.
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