Aervfuranoside: A New Chlorinated Dibenzofuran Glycoside and other Metabolites from the Flowers of Aerva javanica.

Aervfuranoside (1), a new chlorinated dibenzofuran glycoside together with ten (2-11) known compounds were isolated from ethyl acetate soluble fraction of methanolic extract of the flowers of Aerva javanica. The structures of isolates were elucidated by the combination of 1D (¹H and ¹³C-NMR), 2D (HMQC, HMBC and COSY) NMR spectroscopy and mass spectrometry (FABMS, HRFABMS) or in comparison with the literature data in case of known metabolites. Among these isolates, only compounds 1-3 were evaluated for DPPH free radical scavenging potential and enzyme inhibitory activity against acetylcholinesterase (AChE), butyrylcholinesterase (BChE), lipoxygenase (LOX) and metallo-ß-lactamase (IMP-1). The test compound 2 exhibited moderate inhibition of the enzyme lipoxygenase with the IC50 value of 53.5 µM. [ABSTRACT FROM AUTHOR]