The essential oil from fresh leaves of Rosmarinus officinalis L. from Rio d
e Janeiro, Brazil, was isolated by hydrodistillation and analyzed through a
combination of GC and GC/MS. Compounds representing 98.3% of the oil were
identified. Ferry-five constituents were identified according to their chro
matographic retention indices and mass spectra. The major constituents of t
he oil were camphor (26.0%), 1,8-cineole (22.1%), myrcene (12.4%) and alpha
-pinene (11.5%).