Pulicaria Dysenterica Research Articles

Composición en ácidos grasos de los aceites de semillas de especies mediterráneas

In the context of research into the lipids of higher plant, the fatty acid composition of eleven species is reported. These species belong to nine families, and most of them are common in the Mediterranean flora. Oils from some plants (Arctium tomentosum, Hypericum perforatum, Linaria vulgaris. Pulicaria dysenterica, Smilax aspera) were partially hydrolyzed, and contained free fatty acids. Arctium tomentosum seed oil and, to a lesser extent, Smilax aspera seed oil, showed a trans absorption band in their IR spectra. Small quantities of waxes were present in Pulicaria dysenterica and Silybum marianum seed oil. The fatty acid composition of the oils from these plants approaches levels found in food oils as well as industrial oils. Three species showed high levels of their predominant fatty acid: Alliaria petiolata (erucic acid, 41.5%), Linaria vulgaris and Pulicaria dysenterica (linoleic acid, 70 and 72% respectively). In the seed oil of Arctium tomentosum four fatty acids were not identified: one of them could be 3(t), 9(c), 12(c)- octadecatrienoic acid. But the most complex composition was that of Atriplex hortensis oil, which contained thirty three fatty acids, of which fifteen were unknown.

Caryophyllene derivatives from Pulicaria dysenterica

A reinvestigation of the aerial parts of Pulicaria dysenterica has allowed the isolation of six new caryophyllene derivatives and 12 known ones. 13C NMR data of all these derivatives are reported.

Caryophyllene derivatives and a hydroxyisocomene from Pulicaria dysenterica

The investigation of the aerial parts of Pulicaria dysenterica afforded, in addition to known compounds, nine new caryophyllene derivatives with oxygen functions at C-7, C-13 and either C-14 or C-5. One of the keto diols was also present as an ester of a caryophyllenic acid. The roots afforded a new derivative of isocomene together with its precursor. The structures were elucidated by highfield 1H NMR spectroscopy and by some chemical transformations.

6-Hydroxyflavonoids from Pulicaria dysenterica (compositae)

Methyl ethers of 6-hydroxykaempferol and quercetagetin, together with scutellarein, were isolated from the leaves of Pulicaria dysenterica. The pattern of compounds is different from that previously recorded in the flowers.