Abstract
A pair of new enantiomeric trinorsesquiterpenes, (+)-genpenterpene A (1a) and (-)-genpenterpene A (1b), together with seven known compounds (2–8), were isolated from the aerial parts of Justicia gendarussa Burm.f.. All of these known compounds were isolated from this plant for the first time. Racemic genpenterpene A was separated by chiral HPLC column. Their chemical structures were elucidated based on extensive spectroscopic analysis, single crystal X-ray diffraction, and ECD calculations. (+)-genpenterpene A (1a) exhibited potent inhibitory effect against nitric oxide production in lipopolysaccharide-activated RAW 264.7 mouse macrophage cells with an IC50 value of 9.54 ± 1.02 μM.
Graphical abstract
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Disclosure statement
No potential conflict of interest was reported by the authors.