Abstract：
:Phenylpropanoid glycosides, 1'-O-benzyl-alpha-L-rhamnopyranosyl-(1''-->6')-beta-D-glucopyranoside (1) and alpha-L-xylopyranosyl-(4''-->2')-(3-O-beta-D-glucopyranosyl)-1'-O-E-caffeoyl-beta-D-glucopyranoside (2), together with the known derivatives, 1,6-di-O-caffeoyl-beta-D-glucopyranoside (3), 1-O-(E)-caffeoyl-beta-D-glucopyranoside (4) and 1-O-(E)-feruloyl-beta-D-glucopyranoside (5), were isolated from leaves of Coussarea hydrangeifolia. Their structures were determined by IR, HRESIMS, and 1D and 2D NMR experiments, and their antioxidant activities, evaluated by assaying the free radical scavenging capacity using the DPPH (1,1-diphenyl-2-picrylhydrazyl) radical as substrate. The antioxidant activities of 3 and 4 (IC50 values of 15.0 and 19.2 microM, respectively) were comparable to that of the standard positive control caffeic acid, whilst 2 and 5 were only weakly active and 1 was inactive.
journal_name
Phytochemistryjournal_title
Phytochemistryauthors
Hamerski L,Bomm MD,Silva DH,Young MC,Furlan M,Eberlin MN,Castro-Gamboa I,Cavalheiro AJ,da Silva Bolzani Vdoi
10.1016/j.phytochem.2005.06.019subject
Has Abstractpub_date
2005-08-01 00:00:00pages
1927-32issue
16eissn
0031-9422issn
1873-3700pii
S0031-9422(05)00294-3journal_volume
66pub_type
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