ABSTRACT
Two new lignans (1-2), along with five known compounds (3-7) with different structures were isolated from leaves and twigs of Cleistanthus concinnus Croizat. The new lignans were elucidated as (7'R,8'S)-3,3',5'-trimethoxy-4,4'-dihydroxy-7-en-7',9- epoxy-8,8'-lignan (1) and (7'R,8'S)-3,3'-dimethoxy-4,4'-dihydroxy-7-en-7',9-epoxy-8, 8'-lignan (2) by comprehensive spectroscopic analysis including 1D and 2D NMR as well as HREIMS and comparing their NMR data with known compounds in the literature. Among these isolated compounds, compound 1, 2, 3, and 6 were tested for anti- inflammatory effects by inhibiting NO production in lipopolysaccharide (LPS)-stimulated RAW 264.7 cells. Compound 1, 2, and 6 exhibit NO inhibitory activity.[Formula: see text].
Subject(s)
Euphorbiaceae/chemistry , Lignans/chemistry , Lignans/pharmacology , Animals , Anti-Inflammatory Agents, Non-Steroidal/chemistry , Anti-Inflammatory Agents, Non-Steroidal/pharmacology , China , Drug Evaluation, Preclinical , Lipopolysaccharides/pharmacology , Magnetic Resonance Spectroscopy , Mice , Molecular Structure , Nitric Oxide/metabolism , Plant Leaves/chemistry , RAW 264.7 CellsABSTRACT
Two new sesquiterpenoids were isolated from Stellera chamaejasme L., known as the traditional Chinese herb 'Rui Xiang Lang Du'. The compounds were elucidated as stelleraguaianone B (1) and C (2) by comprehensive spectroscopic analysis, including 1D and 2D NMR as well as HRESIMS, and by comparing their NMR data with known compounds. In addition, the structure of 1 was further confirmed by single-crystal X-ray diffraction analysis. Both the compounds were evaluated for their cytotoxicity on common tumour cell lines in vitro, which revealed that compound 1 exhibits cytotoxic activity on A549 cells, while 2 has no activity.