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HERDIN Record #: R10-MSUIIT-17032414023585 Submitted: 24 March 2017 Modified: 27 March 2017

Antioxidant hydroxycinnamic acid derivatives isolated from Brazilian bee pollen.

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

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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.

Publication Type
Natural Product Research
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