SECONDARY METABOLITES FROM Ananas bracteatus LINDLEY (BROMELIACEAE)* * Supported by: CNPq/CAPES.
Fabíola D. Rocha and Maria Auxiliadora C. Kaplan
Núcleo de Pesquisas de Produtos Naturais, Universidade Federal do Rio de Janeiro.
Ananas bracteatus belongs to the family Bromeliaceae which fascinates by the exuberance, diversity and beauty of its species as well as its adaptation ability to the different surroundings (wet, dry, arid, rocky, sunny or shady places). The family complexity generates taxonomic and systematic problems difficult to solve. Therefore an increasing interest has been stimulated to know more about the secondary metabolism products of Bromeliaceae species, particularly Ananas bracteatus, in order to contribute to answer some of those systematic questions.
Purification of the hexane and the methanolic extracts from leaves and hexane extract from fruits of A. bracteatus, through chromatographic techniques, led to 9 compounds that were characterized by spectroscopic analyses as: campesterol, 3b, 6b-cholestanodiol, stigmasterol and sitosterol, from the leaf hexane extract; campesterol, stigmasterol and sitosterol from fruit hexane extract. The methanolic extract from leaves yielded 2-glyceryl ester of p-coumaric acid, a new compound 2-glyceryl ester of ferulic acid, and 5,7,4'-trihydroxy-3,3'-5'-trimethoxy flavone from the dichloromethane fraction; 3b-O-glycopyranosyl sitosterol and 2-glyceryl ester of ferulic acid from the ethyl acetate fraction; and, from the butanolic fraction, 2 new glycosides of ananasic acid.
( November 23, 1999 ) .
Publication Dates
-
Publication in this collection
07 Aug 2000 -
Date of issue
June 2000
