New Pulvinic Acid and Phenylalaninol Derivatives from the Mushrooms Retiboletus griseus and R. nigerrimus

Gertraud Gruber 1 , Lydia Kerschensteiner 1 , Ryuji Marumoto 2 ,  and Wolfgang Steglich 1
  • 1 Department Chemie und Biochemie, Ludwig-Maximilians-Universität, Butenandtstr. 5 – 13, 81377 München, Germany
  • 2 Rokko Mycological Laboratory, 53-1, Okuike-minamimachi, Ashiya, Hyogo 659, Japan

The close genetic relationship of the mushrooms Retiboletus griseus and R. nigerrimus is supported by the occurrence of the orange-yellow retiboletic acid, resp. its methyl ester, in both species. The structures of these highly substituted pulvinic acid derivatives have been elucidated by spectroscopic investigations. R. nigerrimus also contains two N-protocatechuyl-L-phenylalaninol derivatives, nigerrimin A and B, the first reported occurrence of such compounds in nature. Their configuration was established by the synthesis of nigerrimin B

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Zeitschrift für Naturforschung B is an international scientific journal which publishes original papers, microreviews, and letters from all areas of inorganic chemistry, solid state chemistry, coordination chemistry, molecular chemistry, and organic chemistry.

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    New Pulvinic Acid and Phenylalaninol Derivatives from the Mushrooms Retiboletus griseus and R. nigerrimus