PHYTOCHEMICAL STUDY OF TYPHA-DOMINGENESIS PERS (TYPHACEAE)

A general screening for secondary metabolites was performed on leaves of Typha domingensis Pers. Three coumarins, one flavanone and one flavone were isolated. The glycosidic sugars of the compounds were identified by thin layer chromatography

THEVETOSIDE AND DIGITOXIGENIN, CARDENOLIDES FROM 2 SPECIES OF THEVETIA (APOCYNACEAE)

In a comparative analysis of the cardenolides of two Thevetia species, T. ovata Cav. and T thevetioides HBK, the amount of thevetoside in the seeds, and its acetate, was determined, as well as the yield of digitoxigenin obtained from these monoglycosides. T. thevetioides showed a higher concentration of thevetosides (2.81%) than T. ovata (1.06%), which resulted also in a higher yield of digitoxigenin (0.34 and 0.13%, respectively)

chemical study on latex from euphorbia-tanquahuete sesse et moc (euphorbiaceae)

Latex samples of Euphorbia tanquahuete Sesse et Moc. (Euphorbiaceae), collected in the four moon phases, were analyzed to determine the composition of the secondary metabolites and to identify the main components. In the four samples studied only terpenes and steroids were found. The concentration of these compounds varies according to the collection time (moon phase). The major components of the acetonic extracts are lupeol and b-sitosterol

a chromatographic study of flavonoids and fatty-acids of 4 caesalpinia species

A comparative study of the flavonoid chromatographic profiles and of the fatty acid composition of the seed oil was carried out in four species belonging to three different groups in the genus Caesalpinia. Both determinations (statiscally analyzed) gave concurrent results and the dendrograms obtained showed a closer relationship between Caesalpinia velutina Britton et Rose and C. platyloba S. Watson, from the Brasilettia group, than between these two species and C. cacalaco Humboldt et Bonpland (Russellodendron group) and C. hintonii Sandwith (Poincianella group)