Cineole can readily penetrate tissue, one of the reasons for its efficacy in various decongestants and pain relief products (Levison et al., 1994; Yamane et al., 1995). It also has mild bactericidal properties and has been used in herbicidal, insecticidal and allelopathic applications. All these properties are presumably associated with its unique compact chemical form, with the cyclic ether linkage spanning a structure based on cyclohexane