Intraspecific Chemical Variability of Essential Oil of Hoslundia opposita
Chemical investigation on leaves oil of Hoslundia opposita, aromatic plant used 
in traditional medicine, harvested from 20 localities of C?te d’Ivoire 
was realized by GC and GC/MS. In total, 101 compounds were identified 
accounting to 92% - 99%, aromatic compounds such benzyl benzoate and sesquiterpenes 
namely germacrene D, β-caryophyllene and α-humulene hydroxyl were found as the major constituents. As regard, 
the chemical profiles of our samples, it was found a great chemical variability 
suggesting a high polymorphism degree. In order to study this chemical 
variability, the results were submitted to the principal components and cluster 
analysis which allowed distinguishing two main groups of essential oils with 
respect to sampling site. The cluster I was dominated by benzyl benzoate (15%) 
and thymol (7.4%) comprising 6 localities, cluster II was characterized by 
phytol (8.5%) and α-humulene (7%) and constituted by 14 localities.
Hoslundin, hoslundal, and hoslunddiol: three new flavonoids from the twigs of hoslundia opposita (lamiaceae)
Abstract Three new flavonoids (hoslundin 1 , hoslundal 4 , and hoslunddiol 6 ) have been isolated from the twigs of Hoslundia opposita . The structure of hoslundin has been determined mainly by the use of 2D n.m.r. long-range δ C /δ H correlation in conjunction with the ID proton-coupled 13 C n.m.r. spectrum, while the structures of the rest were established using 1 H and 13 C n.m.r. spectroscopy. The manner in which 2D n.m.r. long-range δ C /δ H H correlation experiments are used for determining bond connectivity during the process of structural elucidation is discussed.
Guyanin, a novel tetranortriterpenoid. Structure elucidation by 2-D N.M.R. spectroscopy
Abstract The structure of guyanin, a new type of tetranortriterpenoid isolated from Hortia regia , has been determined by nmr spectroscopy. Indirect shift correlation experiments were crucial for this determination.