Leaf Essential Oil of Two Chemotypes of Eucalyptus cloeziana F. Muell.

Abstract
Two chemotypes ofEucalyptus cloeziana have been detected. The leaf essential oil of one contains mostly α-pinene, with small amounts of other monoterpenes and approximately 10% of sesquiterpenes. The second chemotype contains the β-triketone tasmanone, 4,6,6-trimethyl-5-methoxy-2-isobutanoyl-cyclohex-4-en-l,3-dione (96%) as its principal component. Some taxonomic implications for E. cloeziana and associated species groups within Eucalyptus are discussed.