Volatile constituents of Pilocarpus trachyllophus Holmes and Pilocarpus jaborandi Holmes (Rutaceae) from Northeast of Brazil

The chemical composition of essential oil from leaves, stem bark, stem wood , root bark and root wood of two populations of Pilocarpus jaborandi and th ree populations of P. trachyllophus, collected in the Northeast of Brazil, were compared by GC/MS. 2-Tridecanone (48.7-92.6%) was the major component in ail oils obtained from the stems and roots (21 samples). The oils obtain ed from the nine leaf samples, showed 2-tridecanone as the major component (25.2-60.7%) for four of them, whereas the others showed limonene (67.1%), spathulenol (32.8%), germacrene D (19.7%),(Z)-beta -ocimene (24.4%) and alp ha -cadinol (13.2%), respectively.