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Isolation and Structural Elucidation of Two Plant Ecdysteroids, Gerardiasterone and 22-Epi-20-hydroxyecdysone
1Albert Szent-Gyorgyi Medical University, Department of Pharmacognosy, P.O. Box 121, H-6701 Szeged, Hungary, Université Rene Descartes, Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, CNRS URA 400, 45 rue des Saints-Peres, F-75006 Paris, France, Semmelweis University of Medicine, Department of Pharmacology, P.O. Box 370, H-1445 Budapest, Hungary, and Ecole Normale Superieure, Département de Biologie, Laboratoire de Biochimie, CNRS EP 119, 46 rue d'Ulm, F-75230 Paris Cedex 05, France.
Abstract:
Two minor plant ecdysteroids, 22-epi-20-hydroxyecdysone (1) and gerardiasterone (2), were isolated from Serratula tinctoria L. (Compositae). The first compound, a new natural product, was characterized by an unusual stereochemistry at C-22 (i.e., 22S). The second compound was identified as (20R,23S)-20,23-dihydroxyecdysone, a compound previously isolated from the Zooanthid Gerardia savaglia.
