<b>Volatile constituents of <i>Glechoma hirsute</i> Waldst. & Kit. and <i>G. hederacea</i> L. (<i>Lamiaceae</i>)</b>

Abstract

The essential oils of two Glechoma species from Serbia have been analyzed by GC and GC/MS. Eighty eight and two hundred thirty eight constituents identified accounted for 90.6 and 86.6% of the total oils of G. hirsuta Waldst. & Kit. and G. hederacea L., respectively. In both oils the dominant constituent class was the terpenoid one, 75.7% in G. hirsuta and 47.4% in G. hederacea. 1,8-Cineole (42.6%) and spathulenol (7.4%) were the main constituents of G. hirsuta oil while palmitic (13.3%) and linoleic acids (9.3%) alongside with germacrene D (7.3%) were the major ones of G. hederacea oil. The relative percentage of the sesquiterpene fraction (19.5%) and fatty acid derived compounds (7.6%) distinguished nicely G. hirsuta from G. hederacea. Additionally, oxygenated sesquiterpenes (16.9%) dominated the oil of G. hirsuta, while the reversed situation was noted for G. hederacea oil (the hydrocarbon sesquiterpenes amounted to only 2.6%). The results obtained provide a rationale for the parallel ethnopharmacological usage of G. hirsuta and G. hederacea. This is the first report on the composition of G. hirsuta oil. KEY WORDS KEY WORDS KEY WORDS

Chemical composition of the essential oils fromGlechoma hederaceaplants grown under controlled environmental conditions in Lithuania

“…It could be pointed up that, chemical composition of the essential oils of cultivated ground ivy in Lithuania drastically differentiated from the oil investigated in E. Serbia with principal components palmitic (13.3%) and linoleic acids (9.3%) (7). Whereas, the oil (8,9).…”

“…A very few references concerning chemical composition of the essential oils has been published (6)(7)(8)(9). A review on composition of the oils from plants of the family Labiatae included data on the oil of ground ivy growing in N. America, from New Brunswick (6).…”

“…Germacrene D (19.4%), germacrene B (13.9%), (Z)-β-ocimene (9.2%), β-elemene (8.9%) and 1,8-cineole (6.2%) have been found to be major constituents in the oil. Detailed comparative study has reported chemical composition of the oils of two Glechoma species growing in Eastern Serbia (7). Palmitic (13.3%) and linoleic acids (9.3%) alongside with germacrene D (7.3%) and thymol isobutyrate (5.9%) were determined as the most predominant compounds in the G. hederacea oil (7).…”

Vanillin formation from ferulic acid in Vanilla planifolia is catalysed by a single enzyme

“…Vanilla is the world’s most popular flavour principle and used in numerous products. The pods of the climbing orchids, Vanilla planifolia and V. tahitensis are the source of natural vanilla 1 , although trace amounts of vanillin can be found in a variety of different plant species scattered in the plant kingdom 2 . Vanillin (3-methoxy-4-hydroxybenzaldehyde) is the main flavour component of vanilla extract from cured vanilla pods 1 3 .…”

Chemical composition and chemometric analysis of essential oils variation of Bidens tripartita L. during vegetation stages

“…The compounds were identified by comparison of their linear retention indices (LRI) relative to C 6 -C 24 n-alkanes obtained on a non-polar DB-5 column with those provided in the database (Adams 2007) by matching their mass spectra (NIST05 library) and by comparing the data with previously reported results (Tomczykowa et al 2005;Dvaranauskait_ e et al 2009;Radulovic et al 2010). …”