Sixteen derivatives (2-17) synthesized from the naphthoquinone lapachol (1), were tested for their inhibitory effects on Epstein-Barr virus early antigen (EBV-EA) activation induced by 12-O-tetradecanoylphorbol-13-acetate (TPA), as a test for potential cancer chemopreventive agents. They exhibited a variety of inhibitory activities from very high to moderate, which allow us to suggest structure-activity relationships. Ten of these derivatives are reported for the first time, their structures being thoroughly determined by spectroscopic methods. (C) 2002 Elsevier Science Ltd. All rights reserved.
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Kobe Pharmaceut Univ, Fac Pharmaceut Sci, Higashinada Ku, Kobe, Hyogo 6588558, JapanKobe Pharmaceut Univ, Fac Pharmaceut Sci, Higashinada Ku, Kobe, Hyogo 6588558, Japan
Koyama, Junko
Morita, Izumi
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Kobe Pharmaceut Univ, Fac Pharmaceut Sci, Higashinada Ku, Kobe, Hyogo 6588558, JapanKobe Pharmaceut Univ, Fac Pharmaceut Sci, Higashinada Ku, Kobe, Hyogo 6588558, Japan
Morita, Izumi
Kobayashi, Norihiro
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Kobe Pharmaceut Univ, Fac Pharmaceut Sci, Higashinada Ku, Kobe, Hyogo 6588558, JapanKobe Pharmaceut Univ, Fac Pharmaceut Sci, Higashinada Ku, Kobe, Hyogo 6588558, Japan
Kobayashi, Norihiro
Konoshima, Takao
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Chiba Inst Sci, Fac Pharmaceut Sci, Choshi 2880025, JapanKobe Pharmaceut Univ, Fac Pharmaceut Sci, Higashinada Ku, Kobe, Hyogo 6588558, Japan
Konoshima, Takao
Takasaki, Midori
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Chiba Inst Sci, Fac Pharmaceut Sci, Choshi 2880025, JapanKobe Pharmaceut Univ, Fac Pharmaceut Sci, Higashinada Ku, Kobe, Hyogo 6588558, Japan
Takasaki, Midori
Osakai, Toshiyuki
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Kobe Univ, Grad Sch Sci, Dept Chem, Nada Ku, Kobe, Hyogo 6578501, JapanKobe Pharmaceut Univ, Fac Pharmaceut Sci, Higashinada Ku, Kobe, Hyogo 6588558, Japan
Osakai, Toshiyuki
Tokuda, Harukuni
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Kyoto Prefectural Univ Med, Dept Mol Biochem, Kyoto 6020841, JapanKobe Pharmaceut Univ, Fac Pharmaceut Sci, Higashinada Ku, Kobe, Hyogo 6588558, Japan