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

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 alpha-pinene (33.2%), beta-pinenc (13.0%) and delta-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 alpha-pinene (14.9%), beta-pinene (8.2%), beta-eudesmol (9.1%), alpha-eudesmol (8.8%) and viridiflorene (5.0%).