Very-Long-Chain Wax Constituents from Primula veris and P. acaulis: Does the Paradigm of Non-Branched vs. Branched Chain Dominance Universally Hold in all Plant Taxa?

Herein n-, iso- and anteiso-series of very-long-chained (VLC) alkanes (C -C ), fatty acid benzyl esters (FABEs; C -C ), and 2-alkanones (C -C ) were identified in the wax of Primula veris L. and P. acaulis (L.

Immunomodulatory Constituents of (Snake Liverwort) and the Relationship of Isolepidozenes to Germacranes and Humulanes.

Structural elucidation of three new sesquiterpenoids, namely, (1,4)-lepidoza-1(10),4-dien-14-ol (), -(1(10),4,5,7)-germacra-1(10),6 diene-11,14-diol (), and -(1(10),4,5,7)-humula-1(10),5-diene-7,14-diol (), isolated from the liverwort , was accomplished by a combination of extensive NMR experiments, H NMR simulation, and other means. Additionally, the change of the identity of bicyclogermacren-14-al, previously reported as a constituent, to isolepidozen-14-al is proposed. Compounds and appear to be related to via hydration involving a shared intermediate, a substituted cyclopropylmethyl cation, formed by a highly regio- and stereoselective protonation of , followed by a stereospecific fission of the three-membered ring.

Essential oils and diethyl ether extracts of Serbian Xeranthemum cylindraceum and X. annum: chemical composition, antimicrobial activity, and chemotaxonomic implications.

Detailed GC and GC-MS analyses of the essential oils and Et2 O extracts of two Xeranthemum species - X. cylindraceum and X. annum - resulted in the identification of 254 components, in total.

Essential oil composition of Cachrys cristata--a rare and endangered species in the flora of Serbia.

Cachrys cristata DC. (Apiaceace) is a rare and critically endangered species in the flora of Serbia. Essential oil isolated by hydrodistillation from the aerial parts and fruits of this species was analyzed using combined GC and GC/MS.