Clerodens E–J, antibacterial caffeic acid derivatives from the aerial part of Clerodendranthus spicatus

Six new caffeic acid derivatives, Clerodens E–J (1–6) were isolated from the aerial part of Clerodendranthus spicatus. Their structures were elucidated by extensive spectroscopic analysis, including NMR, MS, and ECD data. Compound 1 showed moderate antibacterial activities against drug-resistant strains of bacteria in vitro.

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