Composición química de los aceites esenciales de frutos de B. simaruba (L.) Sarg y resinas de tres especies de Bur- sera: B. simaruba (L.) Sarg, B. glabra Jack and B. inversa Daly

Abstract

Resins from B. simaruba, B. glabra and B. inversa and essentials oils from B. simaruba fruits collected in Merida (Venezuela) were analyzed by GC-MS. The analysis of resins allowed the identification of 18, 7 and 10 compounds in B. simaruba, B. glabra and B. inversa, respectively. The resins of B. simaruba and B. glabra are dominated by monoterpenes while sesquiterpenes are the predominant components in B. inversa. The major component in the six B. simaruba samples analyzed was α-pinene (52-66 %); three of these samples have α-phellandrene (24-31 %) as other major compound, whereas germacrene D (11-18 %) is a major component of the other three samples. B. glabra is composed principally by limonene (77.6%) and cis-ocimene (7.93 %) whereas B. inversa contains α-humulene (27.7 %), β-caryophyllene (22.1 %) and germacrene B (16.3 %) as major components. On the other hand, 13 and 4 components were identified in endocarps and mesocarps of B. simaruba fruits. Endocarps are dominated by methyl esters of fatty acids (methyl oleate, methyl palmitate and methyl linoleate). Mesocarps are constituted by monoterpenes, the major components are sabinene (59.2 %) and terpinen-4-ol (12.3 %).