Hiroko Yahata

Publications (2)5.78 Total impact

• Article: Serratezomines D and E, new Lycopodium alkaloids from Lycopodium serratum var. serratum.

  Takaaki Kubota, Hiroko Yahata, Sunao Yamamoto, Shigeki Hayashi, Toshiro Shibata, Jun'ichi Kobayashi
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  ABSTRACT: Two new Lycopodium alkaloids, serratezomines D (1) and E (2), were isolated from the club moss Lycopodium serratum var. serratum. Serratezomine D (1) is a new lucidine-type alkaloid, while serratezomine E (2) is a new phlegmarane-type alkaloid. The structures and relative stereochemistry of 1 and 2 were elucidated on the basis of spectroscopic data. Serratezomine D (1) exhibited an inhibitory activity against acetylcholinesterase.
  Bioorganic & medicinal chemistry letters 06/2009; 19(13):3577-80. · 2.65 Impact Factor
• Article: Calyciphyllines N-P, alkaloids from Daphniphyllum calycinum.

  Hiroko Yahata, Takaaki Kubota, Jun'ichi Kobayashi
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  ABSTRACT: Three new Daphniphyllum alkaloids, calyciphyllines N-P (1-3), were isolated from the leaves and stems of Daphniphyllum calycinum. The structures and relative stereochemistry of 1-3 were elucidated on the basis of spectroscopic data.
  Journal of Natural Products 01/2009; 72(1):148-51. · 3.13 Impact Factor