%0 Journal Article
%T Foliar exudates of Blakiella bartsiifolia (S.F. Blake) Cuatrec. (Asteraceae, Astereae). A Preliminary study of the Chemical Composition
%A Maria Pia Calcagno-Pissarelli
%A Miguel Alonso-Amelot
%A Reynaldo Mora
%A Diego Rodr¨ªguez
%J Avances en Qu¨ªmica
%D 2010
%I Universidad de los Andes
%X This is the first phytochemical study of Blakiella bartsiifolia, an endemic species of M¨¦rida. From the foliar exudates two flavonoids ((5,4¡ä-dihydroxy-3,6,7,3¡ä-tetramethoxyflavone; 5,7,4¡ä-trihydroxy-3,8,3¡ä-trimethoxy-flavone) and a labdane diterpene (labda-7,14-dien-13(S)-ol) were identified by high field NMR spectroscopy. Plants naturally exposed to direct sunlight possessed a significantly higher specific absorbance coefficient in the UV region than plants growing in shaded areas.
%K Blakiella bartsiifolia
%K Asteraceae
%K exudates
%K flavonoids
%K labdane diterpene
%U www.saber.ula.ve/bitstream/123456789/32216/1/ac4_5_3.pdf