@misc{oai:repo.qst.go.jp:00069614,
 author = {Nakanishi, Ikuo and Ohkubo, Kei and Uto, Yoshihiro and Kawashima, Tomonori and Manda, Sushma and Fukuhara, Kiyoshi and Okuda, Haruhiro and Hori, Hitoshi and Ikota, Nobuo and Fukuzumi, Shunichi and Ozawa, Toshihiko and Anzai, Kazunori and 中西 郁夫 and Ｍａｎｄａ Ｓｕｓｈｍａ and 小澤 俊彦 and 安西 和紀},
 month = {Nov},
 note = {Artepillin C, a major component of Brazilian propolis, is a prenylated phenylpropanoid, which shows efficient antioxidative activities.  In this study, we synthesized novel artepillin C derivatives in order to enhance the radical-scavenging activity of natural antioxidants.  The scavenging rate constants of DPPH (2,2-diphenyl-1-picrylhydrazyl) radical determined by the stopped-flow technique indicate that the introduction of the electron-donating groups on the benzene ring significantly decreases the enthalpy of the phenolic O-H bond dissociation, resulting in the enhancement of the radical-scavenging activities of the artepillin C derivatives.  There results suggested that the radical-scavenging reactions of the artepillin C derivatives proceed via one-step hydrogen atom transfer rather than proton-coupled electron transfer., 15th Annual Meeting of the Society for Free Radical Biology and Medicine (SFRBM)},
 title = {One-Step Hydrogen Atom Transfer in Radical-Scavenging Reactions by Artepillin C Derivatives Enhanced by Electron-Donating Groups},
 year = {2008}
}