Acylphloroglucinols from the fruits of Callistemon viminalis

Publication date: June 2017 Source:Phytochemistry Letters, Volume 20 Author(s): Lin Wu, Yalong Zhang, Xiaobing Wang, Ruihuan Liu, Minghua Yang, Lingyi Kong, Jun Luo Five new acylphloroglucinols, callistenones L-P (1–5), and three known compounds watsonianone A, callistenones F and H were isolated from the fruits of Callistemon viminalis. Callistenones L and M possessed a bisfuran fused-ring skeleton. Compounds 3–5 were acylphloroglucinol condensed with a β-triketone moiety via a pyrane. Their structures were established from analyses of NMR spectra, CD spectra and X-ray crystallography. Compound 8 showed antibacterial activity against S. aureus with MIC value of 20.3μg/mL and E. coli with MIC value of 15.6μg/mL. Graphical abstract
Source: Phytochemistry Letters - Category: Chemistry Source Type: research