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Planta Med 1998; 64(2): 189-191
DOI: 10.1055/s-2006-957404
Letters
Letter
© Georg Thieme Verlag Stuttgart · New York

Kalaic Acid, A New Ursane-Type Saponin from Musanga cecropioides

D. Lontsi1 , B. L. Sondengam1 , B. Bodo2 , M. T. Martin3
  • 1Department of Organic Chemistry, Faculty of Science, The University of Yaounde, Yaounde, Cameroon
  • 2Muséum National d'Histoire Naturelle, Laboratoire de Chimie, Paris, France
  • 3Institut de Chimie des Substances Naturelles, CNRS, 91198, Gif-sur-Yvette, France
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1997

1997

Publikationsdatum:
04. Januar 2007 (online)

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Abstract

Six pentacyclic triterpenes were isolated from the methylated stembark polar extracts of Musanga cecropioides. One of them, methyl kalaate, is a new saponin. The known compounds were methyl ursolate, methyl oleanolate, methyl 2α-hydroxyursolate, methyl 2α-hydroxyoleanolate, and methyl pomolate. Their structures have been elucidated from 2D-NMR spectroscopic data. A complete 1H- and 13C-NMR spectral assignment of methyl pomolate as well as those of the new saponin have been achieved from 2D-COSY.