Eucalyptol also known as cineole, Promotes benefits of muscle and lung relaxtion. Eucalyptol has been said to make breathing easier. Fresh smelling and producing calming effects, Eucalyptol is found predominantely in Eucalyptus trees, however, you can also find Eucalyptol in rosemary, sage, basil, tea tree, bay leaves and more. Eucalyptol makes up 90% of Eucalyptus oil.