This consists of many different bodies, the most important of which is eucalyptol, a volatile oil, which constitutes about 70%.
Eucalyptus oil also contains, after exposure to the air, a crystallizable resin derived from eucalyptol.
eucalyptol may be given in similar doses, and is preferable for purposes of inhalation.
eucalyptol eu·ca·lyp·tol (yōō'kə-lĭp'tôl', -tōl') or eu·ca·lyp·tole (-tōl')
A colorless oily liquid derived from eucalyptus and used in pharmaceuticals.