• Corpus ID: 92958245

DPPH-radical Scavenging Constituents from the Twigs of Messerschmidia argentea(3)

@inproceedings{Ogihara2002DPPHradicalSC,
  title={DPPH-radical Scavenging Constituents from the Twigs of Messerschmidia argentea(3)},
  author={Kazuhito Ogihara and Risa Nakazato and Yuka Nishi and Matsutake Higa and Seiichi Yogi and 荻原 和仁 and 比嘉 松武 and 与儀 誠一},
  year={2002}
}

• K. Ogihara, Risa Nakazato, +5 authors 与儀 誠一
• Published 1 September 2002
• Chemistry

Five aromatic compounds possessing DPPH-radical scavenging activity were iso lated from a water extract of the twigs of Messerschmidia argentea. These com pounds were identified as rosmarinic acid and its methyl ester, cafferic acid and its methyl ester, and 3-(3', 4'-dihydroxyphenyl)lactic acid, respectively. Introduction Messerschmidia argentea (Japanese name: Monpanoki) is a small tree with large inverted-ovate leaves found on shores of Okinawa Islands. We previously reported the iso lation of pyrrolizidine alkaloids and triterpenoids in the twigs of the plant.U2> The leaves of M. argentea have been used as the first medical treatment against jerryfish venom and known as medicinal plant in Okinawa Islands. We have researched novel biological and phisiological activities for a water extract from the twigs of M. argentea and found that the extract possessed the DPPH-radical scavenging effect. Therefore, we examnined DPPH-radical scavenging constituents in the water extract of the twigs and isolated five aromatic compounds possessing DPPH-radical scavenging effect. Herein, we describe the separation and identification of these constituents. Results and Discussion DPPH-radical scavenging activity of the water extracts from fresh and dry twigs and leaves. Scavenging effect of the water extracts from fresh and dry twigs and leaves on DPPHradicals were exmained. Table 1 shows the DPPH-radical scavenging activity of these water extracts. Most strong scavengining activity was observed with the water extract of dry twigs. DPPH-radical scavenging constituents in the twigs. The water extract of the twigs of M. argentea was subjected to gel-filteration on Received: June 28, 2002 74 Kazuhito Ogihara, Risa Nakazato, Yuka Nishi, Matsutake Higa, and Seiichi Yogi Table 1. DPPH radical scavenging activity of water extracts from the leaves and twigs of Messerachmidia argentea parts conditions activity