Ajugatakasins A and B, New Diterpenoids from Ajuga decumbens, and Feeding Stimulative Activity of Related Neoclerodane Analogs toward the Turnip Sawfly

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概要

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• Adults of the turnip sawfly, Athalia rosae ruficornis, are strongly attracted to the leaves of Ajuga decumbens (Labiatae). Specific feeding stimulants of the sawfly were examined in the leaf surface extracts of A. decumbens. Among seven neoclerodane diterpenoids isolated from the extracts, two new analogs, ajugatakasins A and B, were characterized as 6α, 18-diacetoxy-1β, 12-ditigloyloxy-4α, 17-epoxyneoclerod-13-en-15, 16-olide and its 1β, 12-di-(2-methylbutanoyl)-oxy analog, respectively. Among these analogs, clerodendrin D, a very minor constituent which possesses a tetrahydrofurofuran moiety, was identified as the feeding stimulant for A. rosae ruficornis, while the other analogs with an α, β-unsaturated γ-lactone moiety were found to be completely inactive in the sawfly feeding test.

• 社団法人日本農芸化学会の論文
• 1997-09-23

著者

• KUWAHARA Yasumasa

  Pesticide Research Institute, Faculty of Agriculture, Kyoto University

• NISHIDA Ritsuo

  Pesticide Research Institute, Kyoto University

• Amano T

  Tokyo Univ. Agriculture Atsugi‐shi Jpn

• Nishida Ritsuo

  Pesticide Research Institute College Of Agriculture Kyoto University

• Kuwahara Yasumasa

  Pesticide Research Institute Faculty Of Agriculture Kyoto University

• AMANO Takashi

  Pesticide Research Institute, Faculty of Agriculture, Kyoto University

• Kuwahara Yasumasa

  Pesticide Research Institute College Of Agriculture Kyoto University

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