| Literature DB >> 9599286 |
E J Gamez1, L Luyengi, S K Lee, L F Zhu, B N Zhou, H H Fong, J M Pezzuto, A D Kinghorn.
Abstract
A novel flavonoid diglycoside, 5,6,7,4'-tetrahydroxyflavonol 3-O-rutinoside (1), and a previously known compound, kaempferol 3-O-neohesperidoside (2), were isolated from an ethyl acetate extract of Daphniphyllum calycinum leaves that showed significant activity in a 1,1-diphenyl-2-picrylhydrazyl (DPPH) free-radical assay. The structure of 1 was elucidated by a combination of spectroscopic methods, and compounds 1 and 2 were found to be moderately active as antioxidants in the DPPH assay.Entities:
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Year: 1998 PMID： 9599286 DOI： 10.1021/np9800203
Source DB: PubMed Journal: J Nat Prod ISSN： 0163-3864 Impact factor: 4.050