J. Braz. Chem. Soc. vol.16 número6B

methanol, resulting in esterification of the carboxylic group along with alcohol addition to the double bond to form 16α-methoxy ester 5 (Scheme 2)..

Although thin- layer chromatography and bioautography analyses of the crude extracts revealed a difference in the composition of less polar compounds (those that inhibit the growth

The alkaloidal fractions obtained from ethanolic extracts of leaves and stem barks and root barks were fractioned and analyzed by Thin-Layer Chromatography (TLC) and by

Many Piper species are aromatic and as a consequence the chemical composition of the essential oils of several of them has been the subject of incessant studies, revealing a

A new alkyl phenol, 3-(1,4-dihydroxypentyl)-5-methoxyphenol, was obtained from the heartwood in addition to 5-propylresorcinol, trans -asarone, lyonyresinol, 3-O- β

MS medium plus different growth regulators shows that the presence of 8.87 μ mol L -1 BA and 11.42 μ mol L -1 IAA in the medium resulted in a significant increase of geraniol

fruticosa showed insecticidal activity against the leaf- cutting ants Atta sexdens rubropilosa.. Keywords: Cedrela fissilis, Cipadessa fruticosa , limonoids, triterpenes,

HPLC analysis carried out with plants selected to represent each of these three clusters, showed no significant seasonal variation in the concentration of 1 and 2 in none of