Prenylflavonoids from Flourensia fiebrigii

Three compounds: (2S)-8-(3 ''-methylbut-2 ''-enyl)-7,3 ',4 '-trihydroxyflavanone, (2S)-8-(3 ''-methyl-4 ''-hydroxy-but-2 ''-enyl)-7,3 ',4 '-trihydroxyflavanone and (2S)-8-(3 ''-methyl-4 ''-hydroxy-but-2 ''-enyl)-5,3 ',4 ' trihydroxy-7-methoxyflavanone, along with five previously known compounds, were isolated from the aerial parts of Flourensia fiebrigii. Their structures were elucidated by application of various spectroscopic methods, including ID and 2D NMR techniques. (c) 2007 Elsevier Ltd. All rights reserved.