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Rosemary Oil and Extract
Miyazawa et al. (2003) determined that (-)-verbenone, a constituent of rosemary oil, is metabolized by mammalian tissue to (-)-10-hydroxy-verbenone.
Narayanan (2003) examined the composition of two samples of rosemary oil of South Indian origin. As can be seen from the results presented in T-1, one was found to contain verbenone, while no detectable level was found in the other oil. Furthermore, it was found that the occurrence of verbenone had a perceivable effect on the sensory differentiation between the two oils.
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Rosemary oils produced from plants collected from two divergent Italian hilly environments were analyzed by Angelini et al. (2003). The compositions of these two oils are presented in T-2. Trace amounts of (Z)-3-hexenol, cis-b-terpineol and trans-piperitol were also characterized in the rosemary oils.