Carlos Chaverri

Volatile constituents of the oils from Povedadaphne Quadriporata (lauraceae) from "Alberto M. Brenes" biological preserve, Costa Rica

The composition of the leaf, bark and wood oils of Povedadaphne quadriporata W. Burger from Costa Rica were analyzed by capillary GC/FID and GC/MS. One hundred and sixty-three compounds were identified. The major components from the leaf oil were a-pinene (21.2%), germacrene D (18.1%), b-pinene (14.8%), a-phellandrene (7.8%), a-copaene (6.6%), b-caryophyllene (6.1%) and d-cadinene (3.5%). From bark oil, the main constituents were a-pinene (27.7%), p-cymene (7.8%), b-pinene (7.4%), camphene (3.6%), a-copaene (3.5%) and limonene (3.3%). From wood oil, 1,10-di-epi-cubenol (8.0%), a-eudesmol (3.4%), cadalene (3.4%) and d-cadinene (3.0%) were the major compounds identified. This paper describes for the first time the composition of essential oils in this unique species and genus.

Essential Oils From Beilschmiedia pendula (Sw.) Hemsl. (Lauraceae) From Costa Rica

Abstract The composition of the essential oil from leaves and branches of Beilschmiedia pendula growing wild in Costa Rica was determined by capillary GC-FID and GC/MS. Sixty eight and 67 compounds were identified in the leaf and branch oils respectively corresponding to about 84.3% and 96.7% of the total amount of the oils. The leaf oil consists mainly of monoterpene hydrocarbons (27.4%), sesquiterpene hydrocarbons (33.0%) and oxygenated sesquiterpenes (16.3%). The major components of the leaf oil were β-pinene (10.4%), β-caryophyllene (8.6%), α-pinene (7.9%) and bicyclogermacrene (7.2%). The branch oil consists mainly of sesquiterpene hydrocarbons (59.3%) and oxygenated sesquiterpenes (24.9%). The major components of the branch oil were β-caryophyllene (17.3%), β-selinene (9.1%), bicyclogermacrene (8.9%), α-cadinol (5.8%) and spathulenol (4.6%).

Volatile compounds of Nectandra salicina (lauraceae) from Costa Rica and their cytotoxic activity on cell lines

The chemical composition of the volatiles of Nectandra salicina growing wild in Costa Rica was determined by capillary GC/FID and GC/MS. Thirty-seven and forty-two compounds were identified in the leaf and branch oils respectively corresponding to about 92.6 and 86.2% of the total amount of the oils. The major components of the leaf oil were: atractylone (14.6%), viridiflorene (10.1%), α-pinene (9.4%), β-caryophyllene (7.2%), α-humulene (7.0%), δ-cadinene (6.1%), β-pinene (6.0%) and germacrene D (5.8%). The major components of the branch oil were: atractylone (21.1%), germacrene D (10.7%), viridiflorene (7.9%) and 7-epi-α-selinene (5.0%). When the oils were tested on different cell lines, all the LD50 values were higher than 150 µg/mL, with values very similar for the leaf and branch oils. Low toxicity could be explained by antagonistic effects among the main compounds present in the oils.

Essential Oils from Ocotea austinii C. K. Allen (Lauraceae) from Costa Rica

Abstract The composition of the essential oil from leaves and twig wood of Ocotea austinii growing wild in Costa Rica was determined by capillary GC/FID and GC/MS. Seventy-six and seventy-seven compounds were identified in the leaf and twig wood oils corresponding to about 99.8% and 98.3% of the total amount of the oils, respectively. The leaf oil consists mainly of terpene hydrocarbons (87.5%) and oxygenated terpenes (11.8%). The major components of the leaf oil were β-pinene (33.2%), β-pinene (13.0%) and δ-cadinene (5.7%). The wood oil also consisted mainly of terpene hydrocarbons (67.4%) and oxygenated terpenes (29.9%). The major components of the wood oil were α-pinene (14.9%), β-pinene (8.2%), β-eudesmol (9.1%), α-eudesmol (8.8%) and viridiflorene (5.0%)

Chemical composition of Aiouea costaricensis (Lauraceae) essential oils from Costa Rica and their cytotoxic activity on cell lines.

Abstract The composition of the essential oils of Aiouea costaricensis growing wild in Costa Rica was determined by capillary GC-FID and GC/MS. Seventy-five and fifty-two compounds were identified in the leaf and branch oils, respectively, corresponding to about 95.9% and 90.9% of the total amount of the oils. The leaf oil consists mainly of monoterpene hydrocarbons (30.5%), sesquiterpene hydrocarbons (36.3%) and oxygenated sesquiterpenes (24.5%). The major components of the leaf oil were α-pinene (14.5%), β-pinene (14.0%) and β-caryophyllene (12.0%). The branch oil consists mainly of monoterpene hydrocarbons (46.2%), sesquiterpene hydrocarbons (22.2%) and oxygenated sesquiterpenes (16.4%). The major components of the branch oil were also α-pinene (23.1%), β-pinene (20.2%)