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Two new furofuran lignan glucosides, cannabilignin (1) and isocannabilignin (2), together with four known compounds (3-6), were isolated from the leaves of Vitex negundo var. cannabifolia. The structures of the isolates were elucidated by analysis of spectroscopic data. Compound 3 exhibited weak inhibition of nitric oxide production in lipopolysaccharide-stimulated BV-2 microglial cells with IC
50
value of 69.1 ± 5.8 μM.