Constuyentes de los aceites esenciales de las hojas y espigas de Piper bisasperatum (Piperaceae) / Essential oil components in leaves and stems of Piper bisasperatum (Piperaceae)

ABSTRACT

The composition of the essential oils of the leaves and spikes of Piper bisasperatum Trel. (Piperaceae) obtained by hydrodistillation were investigated by GC-MS. The main constituents of the leaves oil were the sesquiterpenes germacrene D (30.7percent) Beta caryophyllene (9.5 percent) and gamma-elemene (5.9 percent), together with the monoterpene beta-pinene (5.5 percent). The main constituents of the spikes (flowers and fruits) were the monoterpenes beta-pinene (17.5 percent), alpha-pinene (14.0 percent) and the sesquiterpenes germacrene D (19.5 percent), beta-caryophyllene (7.9 percent) and ylangene (7.6 percent). The C6-C1 compounds benzyl benzoate (0.3 percent) and benzaldehyde (< 0.1 percent) were identified for the first time in the genus Piper