Abstract:
:Two new xanthone O-glycosides, polyhongkongenosides A (1) and B (2), together with four known xanthone glycosides, were isolated from the herbs of Polygala hongkongensis Hemsl. Their structures were elucidated on the basis of UV, IR, NMR, and MS spectral data. The antioxidant in vitro activities of 1-6 were determined by the scavenging activities against 1,1-diphenyl-2-picrylhydrazyl (DPPH) radicals and hydroxyl radicals and their reductive activities to Fe3+. Mangiferin, one of the four known xanthone glycosides, showed potential scavenging effect on DPPH and hydroxy radicals and reductive activity to Fe3+ with IC50 values of 4.7, 13.9, 23.7 microM, respectively.
journal_name
J Asian Nat Prod Resjournal_title
Journal of Asian natural products researchauthors
Wu JF,Chen SB,Gao JC,Song HL,Wu LJ,Chen SL,Tu PFdoi
10.1080/10286020801967201subject
Has Abstractpub_date
2008-07-01 00:00:00pages
673-8issue
7-8eissn
1028-6020issn
1477-2213pii
795045909journal_volume
10pub_type
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