Volatile constituents of Stachys palaestina L. (Palestine woundwort) growing in Lebanon.

The hydrodistillation of the aerial parts of Stachys palaestina L. collected in Lebanon in the Kadisha Valley, yielded 0.1% (w/w) of essential oil.

GC and GC-MS analysis of the essential oil of Nepeta cilicica Boiss. ex Benth. from Lebanon.

The hydrodistillation of the aerial parts of Nepeta cilicica Boiss. ex Benth., collected in Lebanon in the Horsh Ehden reserve, yielded 0.

Analysis of essential oils from Scutellaria orientalis ssp. alpina and S. utriculata by GC and GC-MS.

The chemical composition of the essential oils obtained from aerial parts of Scutellaria orientalis L. ssp. alpina (Boiss.

Characterisation of the essential oil of Nepeta glomerata Montbret et Aucher ex Bentham from Lebanon and its biological activities.

The essential oil of Nepeta glomerata from Lebanon was studied by means of GC and GC/MS analysis; 70 compounds were identified. The oil was constituted mainly by monoterpenes and the most abundant components were α-pinene, spathulenol and carvacrol. Nepeta glomerata oil showed antibacterial activity, particularly towards Gram-positive bacteria, and also inhibited LPS-induced NO production in macrophage cell line RAW 264.

Chemical composition and phytotoxic effects of essential oils from four Teucrium species.

The essential oils of four Teucrium species were studied and 131 components, in all, were identified. All oils were rich in sesquiterpenes (50.0-61.

Antimicrobial and antioxidant properties of the essential oil of Salvia lanigera from Cyprus.

The essential oil of aerial parts of Salvia lanigera Poir. (Lamiaceae) growing wild in Cyprus was obtained by hydrodistillation and was analysed by GC and GC-MS. A total of 67 compounds, representing 93.

Hastifolins A-G, antifeedant neo-clerodane diterpenoids from Scutellaria hastifolia.

From the aerial parts of Scutellaria hastifolia, family Lamiaceae (Labiatae), seven neo-clerodane diterpenoids (hastifolins A-G) were isolated. The products are similar to the known scuteparvin and are characterized by being trans-cinnamoyl derivatives. Structures and stereochemistry were determined by intensive NMR investigation.

Essential oil composition of Teucrium divaricatum Sieb. ssp. villosum (Celak.) Rech. fil. growing wild in Lebanon.

Teucrium divaricatum Sieb. ssp. villosum (Celak.

Volatile compounds of flowers and leaves of Sideritis italica (Miller) Greuter et Burdet (Lamiaceae), a plant used as mountain tea.

Sideritis italica (Miller) Greuter et Burdet (Lamiaceae), widely used in ethnopharmacological medicine, occurs in Southern Italy and Sicily. The phytochemical composition of the essential oils of S. italica flowers and leaves, harvested in Piano Battaglia (Sicily), was analysed by GC and GC-MS.

Essential oils of Salvia bracteata and Salvia rubifolia from Lebanon: Chemical composition, antimicrobial activity and inhibitory effect on human melanoma cells.

Aim Of The Study: Salvia bracteata Banks et Sol. and Salvia rubifolia Boiss. are known in folk medicine of Lebanon for the treatment of microbial infections, cancer, urinary and pulmonary problems.

Analysis of essential oil from Teucrium maghrebinum Greuter et Burdet growing wild in Algeria.

The chemical composition of the essential oil obtained from aerial parts of Teucrium maghrebinum growing wild in Algeria was analyzed by GC and GC-MS. Among the 66 identified compounds, delta-cadinene (12.7%), germacrene D (11.

Phytochemical and pharmacological studies on the acetonic extract of Marrubium globosum ssp. libanoticum.

A new natural labdane diterpene, marrulibanoside, was isolated from the acetonic extract of aerial parts of M. globosum Montbr. et Auch.

Labdane Diterpenoids from Marrubium globosum ssp. libanoticum.

From the aerial parts of Marrubium globosum ssp. libanoticum, seven labdane diterpenoids were isolated. Three of them are new natural products [(13R)-9alpha,13alpha-epoxylabda-6beta(19),16(15)-diol dilactone (2), deacetylvitexilactone (7), marrulanic acid (8)], whereas the other four, namely, (13S)-9alpha,13alpha-epoxylabda-6beta(19),16(15)-diol dilactone (1), cyllenin A (3), 15-epi-cyllenin A (4), and marrulibanoside, are previously known compounds.

Chemical composition of the essential oil of Salvia microstegia Boiss. et Balansa growing wild in Lebanon.

The essential oil of aerial parts of Salviamicrostegia Boiss. et Balansa (Lamiaceae) growing wild in Lebanon was obtained by hydrodistillation and was analysed by GC and GC-MS. 70 compounds, representing 94.

Extremely potent antifeedant neo-clerodane derivatives of scutecyprol A.

Two known neo-clerodane diterpenoids, scutecyprol A (1) and scutalbin C (2), have been isolated from the acetone extract of the aerial parts of Scutellaria sieberi. The antifeedant activity of scutecyprol A (1), of its 15-oxo derivative (3), and of several halohydrins (4-9), synthesized starting from compounds 1 and 3, against Spodoptera littoralis have been determined and structure-antifeedant relationships are discussed.

Neoclerodanes from Teucrium orientale.

Two new neoclerodane diterpenoids, 6-deacetyl-teucrolivin A (5) and 8beta-hydroxy-teucrolivin B (6), were isolated from the aerial parts of Teucrium orientale, along with four already known neoclerodane diterpenoids, teucrolivin A (1), teucrolivin B (2), teucrolivin C (3) and teucrolivin H (4), previously isolated from Teucrium oliverianum. Their structures were elucidated on the basis of spectroscopic evidence and chemical transformations. Compounds 1-3 were assayed for antifeedant activity against Spodoptera littoralis, S.

Chemical composition of the essential oil of Salvia multicaulis Vahl. var. simplicifolia Boiss. growing wild in Lebanon.

The essential oil of aerial parts of Salvia multicaulis Vahl. var. simplicifolia Boiss.

Natural and hemisynthetic neoclerodane diterpenoids from scutellaria and their antifeedant activity.

The genus Scutellaria (Labiatae) is a very rich source of neoclerodane diterpenoids, with interesting structural features. These secondary metabolites show several biological properties, the most important being the antifeedant activity against pest insects. The present review reports on natural and hemisynthetic diterpenoids and their antifeedant activity.

Neoclerodane diterpenoids from Teucrium montbretii subsp. libanoticum and their absolute configuration.

From the aerial parts of Teucrium montbretii subsp. libanoticum 10 neoclerodane diterpenoids were isolated. Three of them are new [3beta-hydroxyteubutilin A (1), 12-epi-montanin G (2), 20-epi-3,20-di-O-deacetylteupyreinidin (3)], whereas the other seven, namely, 6-ketoteuscordin (4), teuscordinon (5), 6beta-hydroxyteuscordin (6), montanin D (7), 3,20-di-O-deacetylteupyreinidin (8), montanin G (9), and 3-O-deacetylteugracilin A (10), are previously known structures.