Abstract
Phytochemical investigation on the fruits of C. tabularis led to the isolation of five new phragmalin-type limonoids (1-5) and four known ones (6-9). The structures of the new compounds 1-5, named chuktabamalins A-E, were elucidated via spectroscopic techniques (HRESIMS, 1D and 2D NMR) and were comparable with the literature data of known compounds. In addition, new compounds were evaluated for in vitro anti-inflammatory activity. Compounds 1, 2, 3 and 5 showed moderate anti-inflammatory activity with IC50 values of 21.72 ± 2.79, 23.29 ± 1.00, 47.08 ± 3.47 and 66.67 ± 2.89 μM, respectively.
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