3 rezultatus
A leaf rinse extract with dichloromethane from Dimerostemma vestitum afforded five new eudesmanolides (1-5) along with the known flavone eupafolin. Compounds 1-5 were isolated by chromatographic methods, and their structures were elucidated by spectral analyses. Eudesmanolides 1-4 show a functional
The phytochemical investigation of Dimerostemma arnottii (Asteraceae) afforded, in addition to a known eudesmanolide, two unusual eudesmane methyl ester derivatives and a new eudesmanolide. Structural elucidation of the compounds was based on their 1D and 2D NMR spectroscopic as well as HR-ESI-MS
Two Brazilian species of Dimerostemma (Asteraceae) were chemically investigated. Two known sesquiterpene lactones (STLs), a germacrolide and an eudesmanolide, were isolated from D. episcopale while D. brasilianum afforded the new germacranolide