A New Prenylated Flavonoid from Propolis Collected in Okinawa, Japan

Shigenori KUMAZAWA; Hitomi GOTO; Tomoko HAMASAKA; Syuichi FUKUMOTO; Takunori FUJIMOTO; Tsutomu NAKAYAMA

doi:10.1271/bbb.68.260

Bioscience, Biotechnology, and Biochemistry

Online ISSN : 1347-6947
Print ISSN : 0916-8451

Organic Chemistry Notes

A New Prenylated Flavonoid from Propolis Collected in Okinawa, Japan

Shigenori KUMAZAWA, Hitomi GOTO, Tomoko HAMASAKA, Syuichi FUKUMOTO, Takunori FUJIMOTO, Tsutomu NAKAYAMA

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Keywords: propolis, Okinawa, prenylflavonoid, isonymphaeol-B

JOURNAL FREE ACCESS

2004 Volume 68 Issue 1 Pages 260-262

DOI https://doi.org/10.1271/bbb.68.260

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Abstract

The new prenylflavonoid, isonymphaeol-B (1), together with three known compounds, nymphaeol-A (2), nymphaeol-B (3), and nymphaeol-C (4), were isolated from propolis collected in Okinawa, the southern-most prefecture of Japan. The structure of each compound was determined by spectral methods, including mass spectrometry and 2D NMR. Each compound had 1,1-diphenyl-2-picryl-hydrazyl radical-scavenging activity.

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