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Antioxidant hydroxycinnamic acid derivatives isolated from Brazilian bee pollen.

Author

Shinji Onta,
Toyomi Fujimaki,
Mylene M. Uy ,
Mihokono Yanai,
Akiko Yukiyoshi,
Toshifumi Hirata

Related Institution

Department of Mathematical and Life Sciences - Hiroshima University

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Publication Information

Publication Type
Journal
Title
Natural Product Research
Publication Date
2007
Volume
21
Issue
8
Page(s)
.

Abstract

One novel and three known hydroxycinnamic acid derivatives having antioxidant activities were isolated from a Brazilian bee pollen. They were identified as kaempferol 3-O-[2-O-p-coumaroyl]-α-L-arabinopyranoside, N1, N5, N10-tri-p-coumaroyl spermidine, N1, N5, N10, N14-tetra-p-coumaroyl spermine, and monocaffeoyl-tri-p-coumaroyl spermine, respectively. The structure of the kaempferol glycoside was established on the basis of spectroscopic and chemical investigations. Among the isolated compounds, monocaffeoyl-tri-p-coumaroyl spermine showed the strongest free radical-scavenging activity, which was almost identical to that of α-tocopherol. On the other hand, the antioxidant effect of tri-p-coumaroyl spermidine on autooxidation of linoleic acid was strongest and nearly equal to that of α-tocopherol.

Physical Location

LocationLocation CodeAvailable FormatAvailability
Office of the Vice Chancellor for Research and Extension, Mindanao State University-Iligan Institute Technology Abstract External Link (View)

 
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